7. Next month they in the countryfor 20 years.
A. are
B. have been
C. will be
D. will have been
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8. By thetime Professor Smith retires he for forty years.
A. had taught
B. hastaught
C. willhavetaught
D. willteach
9. Bythetime yougetthere tomorrow,they forBeijing.
A. will haveleft
B. areleaving
C. willleave
D. aretoleave
10. We hoped that by the end of the yearwe the job.
A. hadfinished
B. finished
C. wouldhavefinished
D. willfinish
根据投影原理、标准或有关规定,表示工程对象,并有必要的技术说明的图,称为:()。
A. 图样
B. 图幅
C. 图纸
D. 图形