摘要：36．A．can B．can’t C．may D．must
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I can't go to the cinema with you because I ________ stay here until my mother comes back．
[ ]
A．
can
B．
could
C．
may
D．
must
--- I can't stop playing computer games.
--- For your health, I'm afraid you ________.
[ ]
A．can
B．may
C．must
D．have to
－I can’t stop smoking, doctor．
－For your health, I’m afraid you ________．
[ ]
A．may
B．can
C．must
D．need