题目内容
___ is the most useful invention?
A.Do you think which of these |
B.Which of these you know |
C.Which of these do you know |
D.You know which of these |
【答案】
C
【解析】考察句型,do you know是插入语,与句子结构无关,放在句中。
句意为,你知道这些发明里面哪个是最有用的发明?
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