1. I _____ see the dentist yesterday. It was horrible.
2. Maria _____ see the dentist. She's very lucky.
3. I walked back, thinking I _____ been more careful.
4. He told me that I _____ been so careless.
5. The teacher said we _____ to class.
A. didn't have to
B. didn't need to come
C. should have
D. shouldn't have
E. had to
1: 2: 3: 4: 5: