单项选择题

Mr. Stone（）the money order, otherwise he would have written back before now.

A．has received
B．ought to have received
C．couldn't have received
D．shouldn't have received

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单项选择题
The speaker,（）for her splendid speeches, was warmly received by the audience.

A．having known
B．being known
C．knowing
D．known
单项选择题
No sooner had the words been spoken than he（）that he was foolish.

A．realizes
B．had realized
C．realized
D．has realized
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