单项选择题

Mr. Zhang makes ______ a point to keep up with the latest development in his field.

A. this
B. that
C. it
D. these
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单项选择题
Swimmers are required ______ or make loud noises when they are in the swimming pool.
A. to not dive
B. to dive
C. not to dive
D. not diving
单项选择题
After he regained consciousness, he seemed ______ about the car crash.
A. to forget completely
B. to have completely forgotten
C. forgetting completely
D. having completely forgotten
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