2._____ of their bad habits,the boys switched from being dependent on their parents to _____ for others.( 。
A.Having rid; sacrificingB.To rid; sacrifice
C.Rid; sacrificingD.Riding; sacrifice

分析 擺脫壞習慣后,男孩們從依賴父母的人變成了可以為他人犧牲的人.

解答 答案是C.本題考查非謂語動詞;題干中rid為及物動詞,往往有短語rid sb.of sth.(使某人去除…),本句中the boys 是rid的賓語,故用過去分詞表示被動; switch from…to…(從…轉(zhuǎn)向…)中to是介詞,后跟doing,故第二空用sacrificing,答案是C.

點評 首先判斷選項中的動詞在句中是以謂語還是非謂語形式出現(xiàn),然后根據(jù)選項在句中的功能結(jié)合非謂語的基本用法做出合理的判斷.

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