(2013·重庆高考)—What are you doing this Saturday?—I'm not sure, but I ________ go to  the Rolling Stones concert.
#62394
A
must
B
would
C
should
D
might
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—_____ you please play tennis with me? —Sorry, I _____.
#74769
A
Could; can’t
B
Could; couldn’t
C
Can; don’t
D
Can; couldn’t
I told Sally how to get here, but perhaps I ______for her.
#63022
A
had to write it out
B
must have written it out
C
should write it out
D
ought to have writte it out