necessary,ask every student to write a paper about the topic

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/21 12:19:34

necessary,ask every student to write a paper about the topic.——
A.
Though
B.
If
C.
What
D.
How

necessary,ask every student to write a paper about the topic.
必须的,让每个学生去写一篇关于这个主题的作文.
楼主能告诉我这句话后面的那条横线的意思吗?
再问：不好意思，横线在necessary前面！
再答： If necessary, ask every student to write a paper about the topic. 选B，翻译成：如果必要的话，让每个学生写一篇关于这个主题的作文
再问： C不成啊，有什么必要......
再答： If necessary是祈使句，选What并不能构成祈使句，那么这个句式就不能成立，因为这句话没有主语

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