Cambridge C1 Listening Part 2: Sentence Completion Vocabulary

The question says, “The speaker describes the first estimate as ______.” Before the recording starts, you already know useful things: the gap probably requires an adjective or short adjective phrase, it evaluates an estimate, and the surrounding grammar does not need a second article. Prediction narrows the listening target; it does not license an invented answer.

Cambridge's current C1 Advanced Listening Part 2 is sentence completion. You hear a monologue lasting approximately three minutes and complete eight sentences with information from the recording. The focus is specific information and stated opinion. Cambridge preparation guidance says the word, number, or phrase required is heard on the recording and does not need to be changed; usually no more than three words are required. The task instruction itself asks for a word or short phrase, so follow the exact instruction printed for your test rather than memorizing a maximum as a reason to add detail.

Every Listening recording is heard twice. Use the first hearing to locate and capture the answer; use the second to verify wording, number, and grammar. Continue at the Cambridge C1/C2 vocabulary hub or the Exam English hub.

Predict a category, not an answer

Before listening, inspect both sides of every gap:

• article: a/an predicts a singular countable noun or compatible phrase;
• verb agreement: the reasons were may require a plural complement;
• preposition: indicative of ____ predicts a noun phrase or gerund;
• meaning: the main cause of the delay was ____ predicts a cause, not a date;
• collocation: a substantial ____ may predict increase, difference, or another noun.

Write a small category above the gap: person, place, material, reason, adj, number. This directs attention while keeping you open to the speaker's actual wording.

1. Explicit: capture what is stated

An explicit statement is clear and direct rather than merely suggested. Part 2 requires information heard on the recording, so an inference that seems sensible is not enough.

Question:

The safety instructions were made more ______ after the pilot.

Recording:

“After the pilot, we replaced the vague labels with explicit instructions.”

Answer: explicit.

Do not write clearer just because it paraphrases the idea. The expected answer comes from the recording, and the sentence must work with the exact grammar of the gap.

2. Substantial: predict word class and collocation

Substantial means large or important in amount, degree, or extent. It is an adjective; substantially is the adverb.

Question:

The revised timetable produced a substantial ______ in waiting time.

The gap requires a noun after the adjective. If the recording says “a substantial reduction in waiting time,” write reduction. Writing substantially fails the grammar even though it belongs to the same family.

Conversely:

Waiting time was ______ lower after the change.

Here an adverb can modify lower: substantially may fit if heard. Word-family awareness lets you predict the form without changing what the speaker says.

3. Account for: identify the missing semantic role

Account for can explain a result or describe a share of a total.

Question:

The speaker says that weather may partly account for the ______.

The gap is the result being explained, not the cause. If the recording says “bad weather may partly account for the decline in visitors,” the answer is decline in visitors only if that exact phrase fits the stated limit and printed sentence. A shorter accepted answer may exist in an official key, but you should write the smallest heard phrase that completes the sentence accurately.

Do not reverse the relationship by writing weather. It already appears before the gap as the explanatory factor.

4. Corroborate and substantiate: hear the evidence role

Corroborate means support an existing claim or finding with additional evidence. Substantiate means give a claim an evidentiary basis. They overlap, but both reveal likely answer categories.

Question:

The original observation was later corroborated by ______.

The preposition by predicts an evidence source: records, interviews, another dataset, or a named group. If the recording says “the observation was later corroborated by satellite images,” the answer is satellite images.

Question:

The team used invoices to substantiate its ______.

The gap is the proposition supported by the invoices, perhaps cost estimate. Listen for the complete object rather than writing the evidence source already stated in the question.

5. Plausible: do not convert evaluation into fact

Plausible means reasonably capable of being true on the available facts, not proved.

Question:

The speaker calls equipment failure a ______ explanation.

Recording:

“At first, equipment failure seemed a plausible explanation, though later tests ruled it out.”

Answer: plausible. The later rejection does not erase the word the speaker used at that stage. Part 2 may test a detail in a developing account. Keep the gap's reference point clear.

A worked preview

These questions and transcript are original practice, not Cambridge material.

Questions

1. The first visitor survey produced a ______ response rate.
2. Staff believed the building's location might account for the low ______.
3. Later interviews identified ______ as the main obstacle.
4. The interview finding was corroborated by records from the ______.
5. The project team then made the booking instructions more ______.

Prediction

1. adjective before response rate
2. noun after low
3. problem or cause after identified
4. evidence source or place after the
5. adjective after more

Original transcript

“Our first visitor survey had a disappointingly low response rate. Staff initially thought the building's remote location might account for the low participation. Interviews suggested a different obstacle: booking confusion was the main obstacle reported by visitors. Records from the help desk corroborated that finding, since most enquiries concerned the online form. We therefore made the booking instructions more explicit.”

Answers

1. disappointingly low
2. participation
3. booking confusion
4. help desk
5. explicit

Each gap and recording now align exactly. The answer is heard, fits the predicted category, and completes the printed sentence without changing form.

Paraphrase outside the gap

The sentence around the gap often paraphrases the recording:

Question:

The speaker was surprised by the size of the change in attendance.

Recording:

“What struck me was how substantial the increase in attendance had been.”

The information structure matches even if the question uses surprised and the recording uses struck me. The missing answer may be increase, a word heard exactly. Train two skills at once:

1. recognize the paraphrase that locates the answer;
2. transcribe the answer words accurately.

First and second hearing

First hearing

• Follow the questions in order; Cambridge guidance says the information follows recording order.
• Write an answer as soon as evidence is clear.
• If uncertain, make a brief phonetic note and continue.
• Do not remain mentally at one gap while later answers pass.

Second hearing

• Verify exact wording.
• Check singular/plural against the printed sentence.
• Check whether an article is already supplied.
• Remove unnecessary words that exceed the instruction or break grammar.
• Confirm that the answer is information heard, not your inference.

Common traps

• Writing the paraphrase: you remember the question wording instead of the word heard.
• Wrong semantic category: you write the cause where the gap asks for the result.
• Family substitution: substantial replaces heard substantially.
• Changing the word: you convert the speaker's form when the task requires it unchanged.
• Overlong capture: extra words duplicate the sentence or exceed the instruction.
• Unsupported inference: a likely explanation is never actually stated.
• Ignoring number: the recording says plural records, but the sentence requires and supports a plural answer.

Controlled practice

Questions

1. The team regarded a scheduling conflict as a ______ explanation.
2. Email records later ______ the staff account.
3. The main difficulty proved to be limited access to ______.
4. The revised process produced a substantial reduction in ______.

Original transcript

“Initially, a scheduling conflict seemed a plausible explanation for the delays. Email records later corroborated the staff account, but they also revealed a separate problem: several participants had limited access to transport. Once a shuttle service was introduced, the revised process produced a substantial reduction in missed appointments.”

Answers

1. plausible — the adjective is heard and completes the evaluation.
2. corroborated — the past-tense verb is heard; later preserves the evidence sequence.
3. transport — the question paraphrases separate problem as main difficulty.
4. missed appointments — the noun phrase is heard after reduction in.

Every answer is short, grammatical, and supported by the recording. That is the standard: prediction helps you listen, but the recording supplies the words.

Sources

• C1 Advanced exam format — Cambridge English
• C1 Advanced teaching tips — Cambridge English
• Developing listening skills for C1 Advanced — Cambridge English

Related

• Cambridge C1 word formation vocabulary families
• Cambridge C1 open cloze: grammar and phrases
• Cambridge C1 vocabulary list
• Cambridge C1 key word transformations

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