适用于高一年级基础不太牢固的学生。答案全面，并且详细。
1. The place _______interested me most was the Children's Palace.
A. Which B. where C. what D. in which
2. Do you know the man _______?
A. whom I spoke B. to who spoke C. I spoke to D. that I spoke
3. This is the hotel _______last month.
A. which they stayed B. at that they stayed
C. where they stayed at D. where they stayed
