When first____ to the market, these products enjoyed great success.A．being intro

题型：不详难度：来源：

When first____ to the market, these products enjoyed great success.

A．being introduced

B．having introduced

C．introduced

D．introducing

答案

C

解析

试题分析：这是When引导的省略句，应为：When they were first introduced to the market，这里省略了they were，故选C。状语从句的省略，注意状语从句中的主语同主句主语的一致性，并且从句的主语后有be 时，这时主语和be一起省略。
点评：本题难度适中。为了使话说得简明扼要，英语句子中某个单词、短语甚至从句或主句都可以省去。这种省去句子某些成分而保持句子意思不变的现象，称为省略。它是高中阶段的重要的语法项目，需要考生仔细分析句子结构，来确定省略的内容。
即学即练：If ____ possible, I’ll go there with you.（补充省略的部分）。
解析：If (it is) possible, I’ll go there with you.