One or two man-made satellites () in this country every year.
One or two man-made satellites () in this country every year.
A.have been sent up
B.are sent up
C.will send up
D.is sent up
正确答案:are sent up
One or two man-made satellites () in this country every year.
A.have been sent up
B.are sent up
C.will send up
D.is sent up
正确答案:are sent up
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