题目内容

There is a great selection of books on that topic.

A. difference
B. choice
C. need
D. lack

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Many children complained that readable books were rare those days.

A. cheap
B. interesting
C. easy
D. serious

I’m sorry, I thought those letters had already been sent. It seems that I was misinformed.

A. not informed
B. incompletely ordered
C. given little information
D. wrongly told

It proved to be a fruitful meeting.

A. productive
B. lively
C. popular
D. crowded

Man’s achievement on earth is great; however, he has been endangered by breaking the balance of nature.

A. in danger
B. in trouble
C. defeated
D. creating danger

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