It has been said that “happiness is like a butterfly, which, when , is always beyond our grasp but which, if you will sit down quietly, may alight upon you． A． pursuing B． pursuedC． to pursue D．题目和参考答案——青夏教育精英家教网—

题目内容

It has been said that “happiness is like a butterfly, which, when _ _, is always beyond our grasp but which, if you will sit down quietly, may alight upon you．"

A． pursuing B． pursued

C． to pursue D． having pursued

【解析】

试题分析：考查时间状语从句的省略结构。本题中主句是happiness is like a butterfly，which is always beyond our grasp是做butterfly的非限制性定语从句，when引导的是时间状语从句，且是省略主语的形式，从句的主语就是主句的主语即是happiness，快乐应是被追逐，动词ed形式是表被动，动词ing形式是表主动，句意：有句谚语“快乐就像蝴蝶，当你追逐它时，你总是抓不住，但如果你安静地坐着，快乐也许会降临。”。故选B

考点：考查时间状语从句

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