________ he is a child, ______ he knows much about the computer.
#76970
A
Though…/
B
Although…but
C
Because…so
D
Though…but
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----I missed the first part of the film. It was really a pity.----You _____home half an hour earlier.
#62877
A
should have left 
B
must have left
C
should leave   
D
must leave
I was really busy these days, otherwise I _______ to your birthday party last night.
#62994
A
came
B
did come
C
should have come
D
would have come
—Is Jessica giving us a speech this evening?—No, it _________ be her.She _________ to Japan.
#78277
A
mustn’t;has gone
B
mustn’t; has been
C
can’t; has gone
D
can’t; has been