chọn 1 trong các từ sau điền vào chỗ trống
but - at - which - so - whom - forward - on - will
1/ what did you do .............christmas?
2/i'm looking ...............to meeting her very much
3/ don't forget,...........you?
4/ i haven't got a car..............i've got a motorbike
5/ the car...........won the race last year looked very futuristic
6/ if you go .........littering , the environment will become seriously polluted