问题补充:
I had tomy little sister when my mother was not at home.
A. look for
B. look after
C. look at
D. look into
答案:
A. look for
(答案→)B. look after
C. look at
D. look into
解析:本题的含义是当我的母亲不在家的时候,我得照顾我的妹妹,look after表示照顾的含义,故本题选B。其它短语的意思分别为look for 寻找,look at看一看,look into窥视,意思不符合句意,故不选。