1 BCBBBA
2 It had better be best for us to tell him the truth.
If we are going the theatre this evening, I had better put on my best suit.
It’s a long name, I had better spell it for you.
You had better hot be late
The train is going to leave. We had better say good-bye
Do you feel ill? You had better see a doctor
3 CABABA
补充
1) I hope that he will pass the exam.
2)I believe that the doors and the windows are all closed.
3)I'gald that she is coming tomorrow.
4)I'm sorry that you missed the train.
5)He says that he isn’t feeling very well.
6)I'm afraid that I can’t help you.
7)She thinks that Tom is fight.
8)I'm sure that he will return home next week.
9)She understands that I haven’t got any money.
10)The teacher knows that she has cleaned the classroom.