Bài tập Tiếng Anh 6 Unit 5: Natural wonders of Viet Nam Bài 1: Điền mustn’t hoặc needn’t vào chỗ trống. 1. I …………… take the umbrella. It won’t rain. 2. I…………… cross this bridge. It’s closed. 3. We……………be late. The train will leave in 10 minutes. 4. You …………… hurry. We have plenty of time 5. You …………… smoke in here. It’s forbidden. Look at […]