4. Circle A, B, or C to identify the underlined part that needs correction.
(Khoanh tròn A, B hoặc C để xác định phần gạch chân cần sửa)
1. As soon as it rains, I go to school by bus.
A B C
2. I learned a lot about wildlife until I visited Cuc Phuong National Park last week.
A B C
3. You can't go out to play before you will finish your homework.
A B C
4. Instead of riding a motorbike, walk or cycle while you can.
A B C
5. How much power do we save this year for Earth Hour?
A B C
Bài Làm:
1. B. go to --> will go to
2. B. until --> after
3. C. will finish --> finish
4. C. while --> when
5. B. do --> did