【題目】________ computer lessons, designed for children, is an important qualification for the job.

A.Having studiedB.Having been studiedC.Being studiedD.Had studied

【答案】A

【解析】

考查動(dòng)名詞的完成式。句意：學(xué)習(xí)過專為孩子設(shè)計(jì)的計(jì)算機(jī)課程是擔(dān)任這項(xiàng)工作的一項(xiàng)重要條件。分析句子結(jié)構(gòu)可知，句子缺少主語，故用非謂語中的動(dòng)名詞做主語，又因study這個(gè)動(dòng)作已完成且是主動(dòng)的，故用動(dòng)名詞的完成式having done，故選A項(xiàng)。

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