Besides Tom, ________ Crosettes have two other sons, __________ of whom are all interested in making model planes.
On the bus I saw a student____ I thought was your brother.
We’ll never forget the days ______ we lived in the country.
He lives in a room _______ faces the south.
Is this dictionary _____ you bought yesterday?
The skirt ______ she spent 50 yuan is very beautiful on her.