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 Carbon dioxide(CO2)_______ from burning fuels is the most common of the so-called greenhouse gases.

A.producing                             B.having been produced

C.to be produced                         D.produced

 

【答案】

D

【解析】

試題分析:句意:由于燃燒燃料而產生了的二氧化碳是最常見的被稱為溫室效應氣體。整個句子的謂語動詞是is,所以空格處是非謂語動詞,carbon dioxide與produce之間是被動關系,故用過去分詞,這里不強調produce發生的動作的時間的先后,故選D。

考點:考查非謂語動詞的用法。

點評:本題難度適中。不容置疑,高考將繼續加強對非謂語動詞的考查,試題的特征將繼續呈現出“情景化”和“設問角度的多樣化”的趨勢,但試題的難度將會有所控制。

即學即練:_________ what would happen, none of them could find a way out.

A. Having left wondering                 B. Leaving to wonder

C. Having left to wonder                 D. Left wondering

解析:D。考查非謂語動詞的邏輯主語,由于none of them作leave的邏輯主語,它們之間形成被動關系,故選D項,其他幾項都是主動形式。

 

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