You really must be tired! You .....................................( work) on your ...

[ Mixed Present Tenses ]

You really must be tired! You ……………………………….( work) on your book all day long.

A. have worked

B. are working

C. work

D. have been working

Select your answer:

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Because they are low-lying areas, plains can flood easily.

A. Complex

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I’m exhausted, I ………… staying up this late.

A. am not used to

B. didn’t use to

C. wouldn’t