根据句意及首字母完成句子。

1. There is something wrong with my bike. Would you please help me f _____ it_____ ?

2. The sweater is old. We can g _____ it _____ to the charity.

3. Your parents must be p _____ of you.

4. Would you please c _____  your parents and tell them the news?

5. This is a m _____ new book about American polities.

厂房的骨架中（）作用是加强厂房结构的空间整体刚度和稳定性，它主要传递水平风荷载以及吊车产生的冲切力。

A．基

B．屋盖结构

C．柱子

D．支撑系统