The place of Science and Technology in Modern Life.
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__________taken my advice, you__________now.
A. If you have; wouldn ’t regret
B. If you had; wouldn ’t have regretted
C. If you had ; wouldn ’t regret
D. You had; wouldn’t regret
The manager together with his two secretaries__________for Hong Kong to attend a meeting there.
A. leave
B. leaves
C. to leave
D. is leaving
While building a tunnel through the mountain,_________.
A. an underground lake was discovered
B. there was an underground lake discovered
C. a lake was discovered underground
D. the workers discovered an underground lake
——What’s the matter with you？——the window, my finger was cut unexpectedly.（）
A. Cleaning
B. To clean
C. I was cleaning
D. While I was cleaning
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