Помогите пожалуйста:
1. I am a good doctor, … ?
A) aren’t
B) am not I
C) don’t I
D) didn’t I

2. Jim bought a new car yesterday, … ?
A) doesn’t he
B) didn’t he
C) don’t he
D) won’t he

3. Ann couldn’t find her book, … ?
A) couldn’t she
B) couldn’t her
C) could she
D) can she

4. Mike is the … pupil in the class.
A) good
B) better
C) best
D) bad