单项选择题

The gray building is where the workers live, and the white one is where the spare parts()

A. are produced
B. are producing
C. produced
D. being produced

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单项选择题
I () fill in the form now, shouldn’t I

A. could
B. couldn’t
C. should
D. shouldn’t
单项选择题
Mrs. White became a teacher in 1985. She ()for twenty years by next summer.

A. will teach
B. would have taught
C. has been teaching
D. will have been teaching
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