--- He worked out such different questions at a very young age.--- Oh, he ______ a very smart student then.
#63131
A
could have been
B
should have been
C
might have been
D
must have been
推荐题目
—Can I pay the bill by check? —Sorry, sir. But it is the management rules of hotel that payment _____ be made in cash.
#63203
A
can
B
need
C
will
D
shall
—Mom, can I have that transformer?—Behave yourself and you____ have it．
#63657
A
could
B
shall
C
must
D
may