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

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