Sentence completion questions may occur in any part of the listening test, but they are particularly common in Part 3 in which you will listen to a conversation between up to four people.  

To answer this type of question, you need to complete a set of sentences summarising main ideas from a part of the listening text or the entire listening text.  You will fill in the gaps with a missing word, word group or number that you hear, and these answers will need to fit grammatically in the sentences to be considered correct. You will be given a word limit which must be adhered to.   

Below you can see how this question type looks in the paper-based and computer-delivered tests.