【题目】The clever boy made a hole in the wall, _______ he could see _____ was going on inside house.
A. which; what B. through which; what
C. through that; what D. what; that
在线课程【答案】：B
【解析】：
试题分析：第一个空想表达的意思通过这个洞.....，第二空缺少主语只能用what来连接。句意这个聪明的男孩在墙上挖了一个洞，通过这个洞，他可以看到在房间里发生的一切。