Direction: In the following questions, a part of the sentence is in bold. Below are given alternatives to the bold part at 1, 2 and 3 which may improve the sentence. Choose the correct alter native. In case no improvement is needed, your answer is (4).
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The watchman was on alert all night.
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- was on the alert
- was off the alert
- was alert
- No improvement.
Correct Option: A
on the alert (Idiom) : on guard against danger, attack, etc.; watchful ; ready the will be used.
Hence, was on the alert is the right usage.
