Online shopping, when properly , can save a lot of time ,money and energy..

A. done B. is done

C. having done D. to do

A

【解析】

試題分析:考查非謂語動詞辨析。A. done,過去分詞,表被動; B. is done,被動語態(tài);C. having done,現(xiàn)在分詞的完成式,表示主動;D. to do不定式表示目的,主動關(guān)系。句意:在線購物,當我們恰當?shù)剡\用的話,可以節(jié)省許多的時間,金錢和能力。由句意可知Online shopping與Do之間是被動的關(guān)系,故可排除選項C、D,再由于插入語中無主語,所以要用非謂語,故選A。

考點:考查非謂語動詞辨析。

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