Biến đổi động từ trong ngoặc cho phù hợp:
1. Nam couldnot do the test because he (not go) to school yesterday.
2. it is raining now, i want (have) an umbrella.
3. i (cook) dinner when the phone rang.
4. i suggest (go) by bus.
5. i was watching stars movies when he (ring) the bell.
6. My parents want to see you. They (not see) you for a long time.
7. if they (not study) hard, they will fail their final examination.