A number of theories have been proposed to explain the situation.A tested B ...

作者: tihaiku 人气: - 评论: 0

问题 A number of theories have been proposed to explain the situation.

选项 A tested B used C suggested D announced

答案 C

解析 propose和suggest是同义词，意思都是“建议、提议、提出”，注意用法略有不同，两者后面都对以踉动词的-ing形式，但是propose后面可以用动词不定式，suggest则不可以。可以说 We propose to have a meeting,但是不可以说 We suggest to have a meeting0 test的意思是测试、检验，announce的意思是宣布、公布。

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A number of theories have been proposed to explain the situation.A tested B ...

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