单项选择题

These goods are sold at reduced prices, ______.

A. the defects are pointed out to the customers
B. the defects pointed out to the customers
C. the defects have been pointed out to the customers
D. the defects being pointed out to the customers

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单项选择题

In phrases like generally speaking, judging from, or talking of, the -ing participle is used as a （）

A. comment
B. result
C. condition
D. reason

单项选择题

The commander said to his troops that under no circumstances （）to step across the border.

A. the enemy should be allowed
B. should the enemy be allowed
C. should allow the enemy
D. the enemy should allow