I. Viết lại những câu sau đây dùng liên từ thích hợp 1. We know him. We know his friends. 2. The coat was thin. The coat was warm. 3. It is stupid to do that. It is quite unnecessary. 4. I wanted to go. He wanted to stay. 5. It is rainning.I go out without umbrella. 6. You can go there by bus. You can go there by rain. 7. I was feeling tired. I went to bed when I got home