题目内容
5.(2013辽宁沈阳中考)一How many Chinese astronauts(宇
航员)_into space since 2003?
一Twelve,including two women.
A.were sent B.sent
C.have been sent I).have sent
5. C由时间状语since 2003可知应用现在完成时态;句子主语 "宇航员"与谓语动词之间具有被动关系，用现在完成时的被 动语态，即have been doneQ
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