This is your watch. ___ please.
A. Put away
B. Put on it
C. Put it on
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— Mum, may I watch TV now?— No, you ___ finish your homework first.
A.mustn’t
B. must
C.need
— Excuse me. Look at the sign ___!— Sorry, I didn’t see it.
A. NOT SMOKING
B. NO SMOKING
C. DON’T SMOKE
The last bust has left. We ___ walk home.
A. must
B. have to
C. could
I think I ___ speak English very well when I finish my lessons.
A. can
B. am able to
C. could