问题
选择题
The clever boy made a hole in the wall, _____ he could see _____ was going on inside the house.
A.which;what
B.throughwhich;what
C.throughthat;what
D.what;that
答案
答案:B
第一空考查定语从句,先行词为the wall,通过墙应用through which,第二空考查名词性从句中的宾语从句,从句中缺少主语,所以用what,故选B。