题目内容
—Do you know our city at all?
—Yes, quite well, this is the fourth time I _____ here.
—Yes, quite well, this is the fourth time I _____ here.
[ ]
A. had been
B. have been
C. was
D. am
B. have been
C. was
D. am
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 |
|
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 |