Multiple choice

Which of these fits gap 24?

Directions: Complete this passage by selecting the most suitable option for the corresponding gap.

Kangaroos are animals _____(21)______ only in Australia. They are called marsupial animals because they are the only mammals that _____(22)______ their young ones in a pouch outside their bellies. They are very powerful animals. Kangaroos _____(23)______strong and long hind legs. They use these to hop. They use their long and powerful tails to balance their bodies _____(24)_____ hopping.

  1. while

  2. when

  3. through

  4. by
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The sentence describes simultaneous action: kangaroos balance their bodies at the same time as hopping. 'While' correctly expresses two concurrent actions. 'When' could work but 'while' is better for emphasizing duration. 'Through' implies movement across something, and 'by' would require 'hopping' as a gerund ('by hopping').

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