Man-made-satellites into space by many countries.A. was sent upB. is sent upC. have been s

发布时间：2020-08-16 08:10:08


Man-made-satellites     into space by many countries.
A. was sent up
B. is sent up
C. have been sent up
D. has been sent up

网友回答

A. was sent up
B. is sent up
(答案→)C. have been sent up
D. has been sent up
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