用所给词的正确形式填空。    

1. The students ____ (talk) to each other in the classroom now.

2. How ____ (do) Liu Ming and Liu Ping spend their weekends?

3. I'd like ____ (catch) some ____ (dragonfly) in the park.

4. School ____ (be) over. I can go home now.

5. Ben usually ____ (go). ____ (climb) on Saturdays.

下列关于神经系统结构和功能的叙述，不正确的是（　　）

A．神经系统结构和功能的基本单位是神经元

B．神经系统由脑、脊髓以及它们发出的神经组成

C．中枢神经系统由脑和脑发出的神经组成

D．神经系统调节生命活动的基本方式是反射