When you ________, I know for certain that you will feel much better.
A. are waking up
B. have been waking up
C. wake up
D. have woke
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Hardly had Tom______ when the movie began.
A. seated
B. been been sat
C. sited
D. been seated
-----the ground is wet.-----Yes, didn't you know? ________for the last 20 minutes.
A. It's raining
B. It was raining
C. It's been raining
Johnson _____a novel about ancient China last year, but I don't know whetherhe has finished it.
A. has wrote
B. wrote
C. has written
D. was writing
The air will be further polluted unless some measures________.
A. will be taken
B. are taken
C. were taken
D. had been taken