国家提倡健康公民自愿献血的年龄是（）。

A.十八周岁至四十五周岁

B.十八周岁至五十周岁

C.十八周岁至五十五周岁

D.十八周岁至六十周岁

E.十八周岁至六十五周岁

句型转换（5分）

小题1:He has a backache  .(画线部分提问)

_________ _________ with him ?

小题2:I will take part in the sports meet this year (改为否定句)

I _______ _______ part in the sports meet this year .

小题3:He’s mending his bike now.（用at this time yesterday改写）

He _______ _______ his bike at this time yesterday.

小题4:I think this story is the funniest of all the stories.（同义句转换）

I think this story is _______ _______ any other story.

小题5:Will robots make humans lose their jobs or not ? I’m not sure.

(把两个句子合并成一个句子)

I’m not sure _______ robots ________ make humans lose their jobs or not .