单项选择题

We must（） that the experiment is gong to be controlled as rigidly as possible.

A. assure
B. secure
C. ensure
D. endure

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单项选择题

I would never have （） a court of law if I hadn't been so desperate.

A. sought for
B. accounted for
C. turned up
D. resorted to

单项选择题

One of the reasons for his popularity in our village is that he （） almost everyone every time when he comes back from the big city.

A. looks after
B. cares for
C. asks after
D. runs for

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