19.---______ ---Sorry,I don’t know.A.What do you think happen to Mary?B.What do you think has happened to Mary?C.Do you think what has happened to Mary?D.Do you think what did it happen to Mary?B,C不清楚哪个对?

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19.---______ ---Sorry,I don’t know.A.What do you think happen to Mary?B.What do you think has happened to Mary?C.Do you think what has happened to Mary?D.Do you think what did it happen to Mary?B,C不清楚哪个对?
19.---______ ---Sorry,I don’t know.A.What do you think happen to Mary?
B.What do you think has happened to Mary?
C.Do you think what has happened to Mary?
D.Do you think what did it happen to Mary?
B,C不清楚哪个对?

19.---______ ---Sorry,I don’t know.A.What do you think happen to Mary?B.What do you think has happened to Mary?C.Do you think what has happened to Mary?D.Do you think what did it happen to Mary?B,C不清楚哪个对?
你好!
这道题应该选B.
从语法结构来看,B、C选项单独语法没有错误.
B选项中do you think 在是插入语,只为加强语气.插入语去掉后原本句意不变.类似还有believe、imagine、propose、say、suppose、guess、consider、suggest等.
C选项中do you think是主句,think是谓语,而what has happened to Mary是what引导的宾语从句.一般疑问句都可以用Yes or No来回答,本题显然不可以,若将think换成know就可以.
主要还是由于"你认为谁/什么"的汉语结构对我们的影响,表达“你觉得谁/什么”应该是who/what do you think而不是do you think who/what.
你可以查阅相关资料关于双重疑问句.

选c。因为是过去完成时态。希望你能理解哦。

你好！

选【B】

B这句话可以把do you think提出来，

可以直接写成What has happened to Mary? 意思是：Mary发生了什么事？

加上do you think之后，就是：你认为Mary发生了什么事？

C...

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你好！

选【B】

B这句话可以把do you think提出来，

可以直接写成What has happened to Mary? 意思是：Mary发生了什么事？

加上do you think之后，就是：你认为Mary发生了什么事？

C是个一般疑问句，得用YES,NO 来回答，而且后面的从句该用陈述语序

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B
在英语中，do you think/ consider/guess/believe等常用作插入语。即需放在关系代词或关系副词后面，而不像其他宾语从句。
确保正确，敬请采纳！祝你进步！

亲，本题的正确答案为：C. Do you think what has happened to Mary?

因为what has happened to Mary做think 的宾语，应该用正确的语序，绝对不能用一般疑问句的形式，这是语法知识要求的。
而D就用了一般疑问句的语序，是错误的，语法结构不能这样用的。

祝学习进步，谢谢！...

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