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The country has already sent up three unmanned spacecraft，the most recent ________ at the end of las

题目简介

The country has already sent up three unmanned spacecraft，the most recent ________ at the end of las

题目详情

The country has already sent up three unmanned 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

题型：单选题难度：中档来源：不详

答案

B

　独立主格结构作状语，排除谓语动词形式，即A项。“the most recent”与“launch”为逻辑上的被动关系，且“launch”在谓语动词之前发生。

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