单项选择题

The real trouble ()their lack of confidence in their abilities.

A. lies on
B lies in
C. results in
D. leads to

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单项选择题
——if he (), he () that food. ——Luckily he was sent to the hospital immediately.

A. was warned; would not take
B. had been warned; would not have taken
C. would be warned; had not taken
D. would have been warned; had not taken
单项选择题
The newspaper did not mention the () of the damage caused by the fire.

A. range
B. level
C. extent
D. quantity
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