请说明选择理由1.He made some new _________ in science.A.discovers B

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请说明选择理由
1.He made some new _________ in science.
A.discovers B.discovered C.discovery D.discoveries
2.Neither the students nor the teacher ________ the answer to the question.
A.know B.knows C.don’t know D.doesn’t know
3.Mr.Jack ________ China for several years.
A.has been to B.has come to C.has been in D.came to

D 发现,可数名词
B 就近原则,看nor后面的主语决定谓语动词的形式
A 表示到
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