Do you know who bought this e-dictionary_____him?I think his father_____.A:for;did B:for;boughtC to ;did D:to ; bought应该选哪个两个空分别为什么这么选呢,

Do you know who bought this e-dictionary_____him?I think his father_____.A:for;did B:for;bought
C to ;did D:to ; bought应该选哪个两个空分别为什么这么选呢,

选A.buy sth for sb为某人买了什么东西.后面因为前面已经有bought了,所以用助动词did代替.