题目内容
【题目】_____ of their bad habits,the boys switched from being dependent on their parents to _______ for others.
A. Having rid; sacrificing B. To rid; sacrifice
C. Rid; sacrificing D. Having been rid; sacrifice
【答案】A
【解析】试题分析:考查非谓语动词。句意:通过摆脱坏习惯后,男孩们从依赖父母的人变成了可以为他人牺牲的人。the boys是rid的执行者,要用现在分词的主动形式,排除C和D。changed from...to... (从……转向……)中to是介词,后跟doing。故选A。
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