题目内容
Do you know that you had made ________ mistake?
- A.so serious a
- B.such serious a
- C.a so serious
- D.a too serious
A
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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 |
|
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________ .
|
A.go through; approve |
B.go through; approved |
|
C.get through; approval |
D.look through; approved |