题目内容

Dogs hear far better than human beings do. They are able to hear high ___ that humans cannot hear.

A. variations
B. channels
C. frequencies
D. repetitions

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Asking questions often generates the spark of ___.

A. relativity
B. creativity
C. selectivity
D. sensitivity

I never know what to say when I learn that someone has quit jobs to ___ dreams.

A. chase
B. predict
C. launch
D. ensure

It is not enough to learn from textbooks. ___ take a part-time job to gain some practical experiences.

A. Why should
B. Why not to
C. Why not
D. Why would

C 语言总是从函数开始执行。

A. main
B. 处于最前的
C. 处于最后的
D. 随机选一个