Find out the mistakes

Exercise 2: Find out the mistakes:
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