题目内容

The customers wondered why these items were sold ________ such a low price.

A. at
B. on

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Hobbies and interests can __________ our afterschool life.

A. enlarge
B. enrich

It is surprising that he left without __________ good-bye to us yesterday.

A. say
B. saying

Do you know Mr. Wang will __________ work in our college?

A. not longer
B. no longer

A huge number of trees __________ in this area.

A. has been planted
B. have been planted