theo mih thi pần trắc nghiệm là
1a 5b
2b 6a
3d 7b
4d 8b
còn phần tự luận thì
1.If I had seen the signal, I would have stopped
2. If I knew your number, I would ring
3.If there aren't no taxis, we will only come by bus
4. If we hadn't got a lify, we wouldn't have reached...