37.certain that his invention will lead to the development of production.A. That's　　　B. Th

发布时间：2020-08-16 06:15:17


37.    certain that his invention will lead to the development of production.
A. That's　　　
B. This is　　　
C. It's　　　
D. What's

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A. That's　　　
B. This is　　　
(答案→)C. It's　　　
D. What's
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