A/
1. My house whose gate is dark blue is at that corner.
2. Tom, who had been driving all day, was tired and wanted to stop.
3. My sister asked me a question, which I couldn't answer.
B/
1. Minh is the last boy to leave the boat.
2. You should work in the company sponsored by the British Council.
3. The road joining the two villages is very narrow.
C/
1. This is my new address to which you should write.
2. The girl to whom all students in our class like talking is so kind.
3. I must thank the man from whom I got the present.