题目内容
Do you know when the Great Wall _______?
[ ]
A. was come into being
B. came into being
C. had come into being
D. had been come into being
B. came into being
C. had come into being
D. had been come into being
B
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___ is the most useful invention?
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A.Do you think which of these |
B.Which of these you know |
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C.Which of these do you know |
D.You know which of these |
Do you know the stages every inventor must ________ before they can have their invention________ .
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A.go through; approve |
B.go through; approved |
|
C.get through; approval |
D.look through; approved |