Select the option that will improve the underlined part of the sentence. In case no
improvement is needed, select 'No improvement'.
The prisoners are kept at constant surveillance.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. kept under
- The given sentence is gramatically wrong.
- Here 'kept under' should be used instead of 'kept at'.
- 'Kept under surveillance' is phrasal verb which means 'to watch something closely'.
Clearly, the correct sentence is-
The prisoners are kept under constant surveillance.
The correct answer is-
kept under