用所给词的适当形式填空。

1.  A dog has four ___________( foot).

2.  How many ___________ ( tooth)  does a tiger have?

3.  What's the matter with ____________( he) ?

4. My father___________ (have) a headache and can't go to work.

5. When my teacher get an___________(ill), he should have a good rest

根据《建筑施工工具式脚手架安全技术规范》，整体式附着升降脚手架是有（）个以上提升装置的连跨升降的附着式升降脚手架。

A.1

B.2

C.3

D.4