So far many man-made satellites_____into space. A.have been set up B.are being set up

题目

So far many man-made satellites_____into space. A.have been set up B.are being set up
C.have set up
D.have bing set up

答案

选 A have been set up
解析：
① so far 到目前为止,句子用现在完成时
②主语是人造卫星,应该是 被发射,所以是被动
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