(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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He failed in the driving test again. He         .
#62842
A
must have disappointed
B
must have been disappointed
C
might be disappointed
D
couldn’t be disappointed