Wastepapershouldn’t_____everywhere.It’sourdutytokeepourclassroomcleanA.

发布时间:2020-08-13 06:13:46

Waste paper shouldn’t _____ everywhere. It’s our duty to keep our classroom cleanA.be thrownB.throwC.is thrown

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A解析本题的含义是不应该到此乱扔废纸,should为情态动词后加动词原形,本题前半句表示被动的意思,结构为be+过去分词,故本题选A。
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