单项选择题

Throughout the past few centuries there ______ recorded reports of space vehicles which have visited our earth from another planet.

A．have been
B．are
C．had been
D．were
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单项选择题
Almost everyone failed ______ on the first day.
A．pass his driver's test
B．to have passed his driver's test
C．to pass his driver's test
D．parsing his driver's test
单项选择题
You could scarcely have found a better person for the job ______ Mr. Lee.
A．when
B．and
C．as
D．than
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