单项选择题

Mary ______ that the purchase had been a mistake. However, she didn't.

A．ought to acknowledged
B．ought to have acknowledged
C．should acknowledge
D．should be acknowledging
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单项选择题
What is NOT the feature of Hemingway’s heroes
A．Pay no attention to other’s feelings.
B．In face of defeat they continue to fight with the despairing courage.
C．They cannot find the meaning of life.
D．They often have stoic endurance and fight in vain.
单项选择题
What is NOT true about the construction of the Channel
A．A British team started to drill southeast from Dover.
B．A French team started to drill northwest from Sangatte.
C．The two teams started drilling in 1990.
D．The two teams met under the Channel in December, 1990.
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