. (2010·江西名校模拟) —I’ve heard they went skiing in the mountains last winter.                           —It ______ true because there was so little snow there then. 
#63673
A
may not be
B
won’t be
C
couldn’t be
D
mustn’t be
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— Happy birthday!— Thank you! It’s the best present I _______ for.
#63508
A
should have wished
B
must have wished
C
may have wished
D
could have wished
She ______have stopped her work halfway.
#63021
A
ought to not
B
ought not to
C
not ought to
D
does not ought to