完成句子。

1. My classmates are going to skate in the afternoon. (改为否定句)

    My classmates ________ ________ to skate in the afternoon.

2. Mr. Zhao goes fishing every weekend. (改为反意疑问句)

    Mr. Zhao goes fishing every weekend, ________ ________?

3. Bruce has art lessons twice a week. (对画线部分提问)

   ________ ________ does Bruce have art lessons?

4. I spend half an hour doing morning exercises every day. (改为同义句)

    It ________ me half an hour to ________ morning exercises every day.

5. 请等待我们的好消息！(完成译句)

   Please ________ ________ our good news!

痉证的主要病机是（）

A．经络闭阻

B．气机不和

C．血行不畅

D．筋脉失养

E．骨髓失充