单项选择题Observations were made ______ the children at the beginning and at the end of pre-school and first grade.

A.towards
B.of
C.on
D.with

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2Since she is angry, we ______ her alone.

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

3Henry"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

4Blance 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

5Eve 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