Question

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

Answer 1

D

試題分析：句意：由于燃燒燃料而產(chǎn)生了的二氧化碳是最常見的被稱為溫室效應(yīng)氣體。整個(gè)句子的謂語動(dòng)詞是is，所以空格處是非謂語動(dòng)詞，carbon dioxide與produce之間是被動(dòng)關(guān)系，故用過去分詞，這里不強(qiáng)調(diào)produce發(fā)生的動(dòng)作的時(shí)間的先后，故選D。
點(diǎn)評：本題難度適中。不容置疑，高考將繼續(xù)加強(qiáng)對非謂語動(dòng)詞的考查，試題的特征將繼續(xù)呈現(xiàn)出“情景化”和“設(shè)問角度的多樣化”的趨勢，但試題的難度將會(huì)有所控制。
即學(xué)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�？疾榉侵^語動(dòng)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(dòng)關(guān)系，故選D項(xiàng)，其他幾項(xiàng)都是主動(dòng)形式。