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5道关于名词性从句的简单题目.

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5道关于名词性从句的简单题目.
自己预习了一下名词性从句.有些题不会,
1.-I believe_______you've done your best and ______things will improve.
-Thank you.
A.that;/ B/;/ C.what;that D./;that
2.Please give the book to_____wins the first prize in the singing contest.
A.who B.whom C.whoever D.whomever
3.It looks____he is unhappy today.
A.that B.if C.as if D.whether
4._____they don't like his style is very clear.
A.what B.that C.which D.where
5.Has it been announced________the planes are to take off?
A.when B.if C.which D.what
答案按照顺序依次为:1.D
2.C
3.C
4.B
5.A
请把为何选正确答案的理由写下来,不一定多,但一定要说清楚好么.
PS:5道里不一定要全会,回答的题目越多分就给谁~
5道关于名词性从句的简单题目.
1.D
I believe+宾从,宾语从句中的第二个that不能省略.
2.C
谁 wins the first prize in the singing contest,此时中的谁没有特指,而且在从句中充当主语,所以采用whoever.
3.C
as if在look,seem 等系动词后引导的是表语从句.
as if 从句用陈述语气的情况.当说话者认为句子所述的是真实的或极有可能发生或存在的事实时.
如:
It sounds as if it is raining.
听起来像是在下雨.
He talks as if he is drunk.
从他谈话的样子来看他是醉了.
4.B
they don't like his style是一个完整的句子,不缺句子的主要成分,所以在这里要么是做主语从句,要么缺少状语,而主语从句的that是不能省略的.
5.A
Has it been announced+主语从句,这里it是形式主语,而the planes are to take off是一个完整的句子,不缺句子的主要成分,所以这里要么是填that,要么缺状语.根据语境,就可以知道此处缺的是时间状语了.