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________he will come to the exhibition is certain.
A.That B.What C.If D.Whether
老师，这题选什么？
网校学员uoC**在学习英语零基础直达PETS三级/公共英语三级【开学季专享班】时提出了此问题，已有2人帮助了TA。
网校助教
AnnieGuo0909
同学你好，该知识点来自沪江网校《英语零基础直达PETS三级/公共英语三级【开学季专享班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。
同学好：这里选A。
句意为：他将会来展览会是确定的。
_ he will come to the exhibition 是句子的主语；is 是系动词；certain 是表语；
由此，这里要选择主语从句的引导词。
what 表示“什么”，从句本身含义完整，不需要该含义，排除B；
主语从句在句首时，不能用if 引导，排除C；
whether 可以在句首引导主语从句，但句子本身不需要“是否”这个含义，排除D。
that 引导主语从句，本身无意义，不翻译；符合句意和语法。
祝学习愉快！
网校学员
uoC**
老师，it能引导主语从句吧？
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英语零基础直达PETS三级/公共英语三级【开学季专享班】
已有1人在本课程中发现了157个知识
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本课程热门知识点
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Can you imagine why ___?
A.did the boy say that
B.the boy said that
C.did the boy say
D.the boy said
老师，B比D只多了个that,句子就完整了吗？ -
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________he will come to the exhibition is certain.
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老师，这题选什么？ -
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