题目内容

_______ at all is worth doing well.

A. Whatever is worth doing
B. That is worth doing
C. What is worth doing it
D. Whatever is worth doing it

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They built a highway _______ the mountains.

A. lead into
B. to lead into
C. led into
D. leading into

The challenge is not one of expansion. _______, the rapid growth in enrollment over the last 40 years has come to an end.

As a result
By all means
C. In contrast
D. On the contrary

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PC机的硬件系统主要由主机、内存储器、外存储器、__输入设备___和_____组成

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