单项选择题I"ve kept up a friendship with a girl whom I was at school ______ twenty years ago.

A.about
B.since
C.till
D.with


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4.单项选择题Since she is angry, we ______ her alone.

A.had better leaving
B.must leave
C.can leave
D.might as well leave

5.单项选择题Henry"s car stopped on the highway. It ______ out of gas.

A.may not run
B.may have run
C.must run
D.ought to run

6.单项选择题Blance got a parking ticket. She ______ in a reserved spot since she had no permit.

A.can"t park
B.couldn"t have parked
C.should not have parked
D.should not park

7.单项选择题Eve had to pay $5.00 because she wrote a bad (空头的) check. She ______ her money before she wrote a check.

A.must have deposited
B.might have deposited
C.can have deposited
D.should have deposited

8.单项选择题He was away ill. He ______ the meeting here.

A.must not have attended
B.could not be able to attend
C.can"t have attended
D.mustn"t attend

9.单项选择题He can"t plead ignorance as his excuse; he ______ what was happening in his own department.

A.would know
B.should have known
C.had known
D.has known

10.单项选择题I should like ______ the result earlier.

A.to tell
B.having told
C.to have told
D.to have been told