The country has already sent up 3 unmanned spacecraft, the most recent        at

The country has already sent up 3 unmanned spacecraft, the most recent        at

题型:不详难度:来源:
The country has already sent up 3 unmanned spacecraft, the most recent        at the end of last March.
A.was launchedB.being launched
C.has been launchedD.having been launched

答案
D
解析

试题分析:考查独立主格结构:此句前后句没连词,只有逗号是不能连接两个句子的,所以后边the most recent ______ at the end of last March就是独立主格的形式了,在句中做伴随状语,the most recent和launch是被动关系,而且是去年三月已经被发射了,用现在分词完成式的被动式。句意:中国已经发射了3颗无人飞船,最近在去年的三月已经被发射。选D。
点评:独立主格结构是高考的难点,很多学生感到有困难,关键是学会分析句子成分,两句话没有连词又不是定语从句,就是独立主格结构:逻辑主语+非谓语动词/名词/adj/adv/介词短语。
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