单项选择题

A. No, I don’t know. B. Here you are.
C. Yes, you pay it by cash. D. Three dollars, please.
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单项选择题
A. He didn’t sleep last night. B. He works so hard.C. The meeting went on four hours. D. He kept talking at the meeting.
A. He didn’t sleep last night.
B. He works so hard.
C. The meeting went on four hours.
D. He kept talking at the meeting.
填空题
The results of this research can be applied to new (develop) ______ in technology.
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