Suggestions have been put forward guns should be more strictly controlled in the USA.A.

发布时间：2020-08-17 04:37:41

Suggestions have been put forward      guns should be more strictly controlled in the USA.
A. before               B. that         C. when             D. as

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解析：考查同位语从句：句意：建议被提出美国的枪支应该被严格控制。同位词是suggestions，that引导同位语从句，对suggestions的内容做出说明，that不做成分，也不能省略。选B。
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