When first____ to the market, these products enjoyed great success.
A.being introducedB.having introducedC.introducedD.introducing
C

試題分析:這是When引導(dǎo)的省略句,應(yīng)為:When they were first introduced to the market,這里省略了they were,故選C。狀語從句的省略,注意狀語從句中的主語同主句主語的一致性,并且從句的主語后有be 時(shí),這時(shí)主語和be一起省略。
點(diǎn)評(píng):本題難度適中。為了使話說得簡明扼要,英語句子中某個(gè)單詞、短語甚至從句或主句都可以省去。這種省去句子某些成分而保持句子意思不變的現(xiàn)象,稱為省略。它是高中階段的重要的語法項(xiàng)目,需要考生仔細(xì)分析句子結(jié)構(gòu),來確定省略的內(nèi)容。
即學(xué)即練:If ____ possible, I’ll go there with you.(補(bǔ)充省略的部分)。
解析:If (it is) possible, I’ll go there with you.
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