Grammar
4. Which of the underlined parts in each question is incorrect? Find and correct it.
(Phần nào được gạch chân trong mỗi câu hỏi là không chính xác? Tìm và sửa nó)
1. The scientists did an experiment on three hours yesterday.
A B C
2. Do you think robot teachers will replace human teachers by 20 years?
A B C
3. These contact lenses are mine; they aren't your.
A B C
4. This is Ann, a friend in mine from the UK.
A B C
5. You should be at school for 7:00 a.m., so hurry up.
A B C
Bài Làm:
1. B. on --> for
2. C. by --> in
3. C. your --> yours
4. B. in --> of
5. B. for --> at