题目内容
15.Chinahas sent(send) up several Shenzhou manned spacecraft into space since 2003.分析 从2003年起,中国已向太空发射了好几个载人宇宙飞船.
解答 根据时间状语since 2003可知此句要用现在完成时,China应视为单数,故答案为has sent.
点评 此题考查现在完成时,现在完成时表示过去发生的动作对现在造成的影响和结果,注意since,for引导的时间状语.
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