单项选择题

Tom could hardly（）his excitement as he knew that he had made a real dis covery

A. conceal
B. reveal
C. show
D. discover

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单项选择题
Military orders are（）and cannot be disobeyed.

A. defective
B. conservative
C. alternative
D. imperative
单项选择题
Although she did not look back she could tell that he was still following. Let（）a streetcar, she thought, and really there was one

A．there were
B．there be
C．there being
D．there has been
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