(2013·浙江,8)Eye doctors recommend that a child's first eye exam ________ at the age of six months old.
#86621
A
was
B
be
C
were
D
is
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He       have come here yesterday,        he?
#89653
A
mustn’t;did
B
couldn’t;has
C
mustn’t;haven’t
D
must;didn’t
The weather turned out to be fine yesterday. I          the trouble to carry my umbrella.
#86907
A
needn’t take
B
couldn’t take
C
needn’t have taken
D
couldn’t have taken