Direction: In the following questions, the sentences given with blanks are to be filled with appropriate word(s). Four alternatives are suggested for each question. For each question, choose the correct alternative.
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The police is ___ on his activities.
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- keeping an eye
- keeping watchful eyes
- keeping both eyes
- keeping one eye
- keeping an eye
Correct Option: A
keep an eye (Id.) : to take care of something
Here, keeping an eye is the right option.
