既然是last March,排除CD,因為是已經(jīng)完成的
如果是A,就成了兩個獨立的句子,逗號不能連接兩個獨立的句子.
所以選B,使后半句成為分句
〖07山東〗The country has already sent up three unmanned spacecraft,the most recent ________at the end of last March.
〖07山東〗The country has already sent up three unmanned spacecraft,the most recent ________at the end of last March.
A.has been launched B.having been launched C.being launched D.to be launched
A.has been launched B.having been launched C.being launched D.to be launched
英語人氣：356 ℃時間：2019-11-06 00:42:34
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