(2013·四川省都江堰市二模)—Mike, I can't find my watch anywhere.—You ________ it while working out.
#62422
A
may have lost
B
could have lost
C
would have lost
D
should have lost
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—May I swim here?  — No, you _______.  It is dangerous.
#62690
A
won’t
B
needn’t
C
mustn’t
D
don’t have to
We _______ play on this road. There is too much traffic. 
#74694
A
must
B
mustn’t
C
need
D
needn’t
I__________through that bitter period without your generous help.     
#63620
A
couldn’t have gone
B
didn’t go
C
wouldn’t go
D
hadn’t gone