1．Mr Zhang, ________ came to see me yesterday, is a friend of mine.
答案：who
2．We walked down the village street, ________ they were having market day.
答案：where
3．He works in a middle school, in front of ________ there is a river.
答案：which
4．She came into a big room, in the middle of ________ stood a large table.
答案：which
5．Her bag, in ________ she put all her books, has not been found.
答案：which
