____ printed, this science fiction will be popular among the students.
A.BeforeB.UnlessC.WhenD.Once
D

試題分析:句意:一旦印刷出來,這個科幻小說將在學(xué)生中間受到歡迎的。before在……以前;      unless除非; when當(dāng)……時候; once一旦。這里是once后跟省略句,完整的是once it is printed,當(dāng)從句的主語與主語的一致,并且從句的謂語動詞有be時,從句的主語及be都省去,根據(jù)句意故選D。
點(diǎn)評:本題難度適中。狀語從句的省略是高中應(yīng)該掌握的語法項目,需要考生牢記省略的各種情況。
需正確理解句意及正確分析句子的成分才能做出正確的判斷。
即學(xué)即練:When first____to the market, the computer software was not a success due to its complexity in operation.
A. introducing                     B. being introduced
C. introduced                      D. to be introduced
解析:C?疾槭÷越Y(jié)構(gòu)。在狀語從句中,當(dāng)主、從句主語一致,且從句中含有系動詞be的各種形式時,通常將主語和系動詞省略,故選C。
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