____you be happy every day and succeed in your work!
A. May
B. Must
C. could
D. would
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____you rather live in a town or in the country?
A. may
B. shall
C. could
D. Would
There's nothing to do , so I___as well go to bed.
A. may
B. was able
C. can
D. will
You___leave your key at the reception desk.
A. may
B. was able to
C. should
D. would
A computer can't think itself, it___ be told what to do.
A. may
B. able to
C. must
D. would