Find out the mistakes

Exercise 2: Find out the mistakes:
1. If you don’t try your best, you would fail the next exam.
A B C D
2. Unless you do all of the exercises given by the teacher, you won’t be punished.
A B C D
3. She had had more good marks if she had prepared the lesson carefully.
A B C D
4. If your mother bought you a dictionary, you can learn English better.
A B C D
5. If yesterday I stayed at home, I would not be tired today.
A B C D
6. Unless they come early, they would meet him at the meeting.
A B C D
7. Had you review all the lesson carefully, you would have passed the exam.
A B C D
8. Should you wanted to attend the course of English, let me know.
A B C D