The clever boy made a hole in the wall, ________ he could see what was happening inside the house．

1. A.
   in which
2. B.
   through which
3. C.
   for whom
4. D.
   on which

The clever boy made a hole in the wall, ________ he could see what was happening inside the house.

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The clever boy made a hole in the wall, ______he could see what was happening inside the house.

A. in which　　　　    　　  　　　　　　　　   B. through which

C. for whom　　　　　　 　　　　　　　　　　  D. on which

A. in which　　　　    　　  　　　　　　　　   B. through which

C. for whom　　　　　　 　　　　　　　　　　  D. on which

The clever boy made a hole in the wall, ________ he could see what was happening inside the house.

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