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单选题
127.The country has already sent up three unmanned spacecraft, the most recentat the end of lastMarch.
A
A. has been launched
B
B. having been launched
C
C. being launched
D
D. to be launched
答案解析
正确答案：B
解析：
127.【翻译］这个国家已经发射了三艘无人飞船，最近的一艘是在去年三月底发射的【精析】B分析句子结构可知,逗号前面是一个完整的句子，且逗号前后两部分之间没有连词，因此逗号后面应 是独立主格结构，故排除A项。根据句意可知,launch所表示的动作发生在谓语动词has sent up所表示的动作之 前，且the most recent （ spacecraft）和launch之间是逻辑上的动宾关系，所以应用现在分词的完成被动式，即having been +过去分词”的形式。故选
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