As a graducate in computer science, he ___ to work out the problem.
#89044
A
wouldn't have failed
B
can't have failed
C
mustn’t have failed
D
might not have failed
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It was required by the headmaster that all the students at the meeting.
#87897
A
should present
B
present
C
attended
D
be present
—Why didn’t you put your cellphone in your overcoat pocket?—I _____, but I was afraid it would be stolen.
#89527
A
had put
B
put
C
would have
D
could have
He did not regret saying what he did but felt that he it differently.
#90495
A
could express
B
would express
C
could have expressed
D
must have expressed