句型转换。

1. I used to be afraid of flying in an airplane. (改为同义句)

    I used to be afraid ___________ in an airplane.

2. I don't know how I can swim well. (改为简单句)

    I don't know ___________ well.

3. It seems that he has passed the exam. (改为简单句)

    He __________ passed the exam.

4. I used to have long hair. (改为同义句)

    I ___________ have long hair ___________.

5. You used to play the piano, ___________? (完成反意疑问句)

依据风险的( )，可将风险分为纯粹风险和投机风险。

A．度量方式
B．损失载体
C．产生原因
D．可能后果