18. Out ________, with a ruler in his hand. A. did he rush B. rushed he C. h
问题描述：
18. Out ________, with a ruler in his hand. A. did he rush B. rushed he C. h
China has already sent up three 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
为什么选B
答
第一个题目我已经给你解释了!答案 he rushed
第二题:
the most recent [ having been launched] at the end of last March
此结构是[ 名词+ 分词短语] 的"独立主格结构"
因为前面China has already sent up three spacecraft 是个完整的句子,所以,在没有连词的情况下,后面不能选A 而成为一个句子.如果选A,后面的句子和前面的既不构成并列关系,又不是主次从属的关系.非谓语动词这部分好难啊慢慢来吧
要是满意请【采纳】因为用has 是完成时 所以后面也要用现在分词的完成式吗？？？差不多.has already sent up 表示"已经发送", 那最近一次发送的又是at the end of last March"去年三月末", 这些信息都已经明显表示"已经"这个概念, 故用having been launched. 即表完成,又表被动