問題詳情：
They often leave the boy alone at home. They think that he’s old enough to look after _____.
A. them B. himself C. themselves D. him
【回答】
B
【解析】本題考查的是反身代詞的用法。句意是説他們認為他足夠大了能夠照顧他自己，故用himself，選B。
知識點：人稱代詞
題型：選擇題
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