根据句意和首字母填写单词。

1. At that time people r_____ that the story was a hoax.

2. A reporter a_____ that there would be no more spaghetti.

3. The man was so c_____ that hundreds of people believed the story.

4. Next year they will get m_____.

5. The spaghetti f_____ in Italy stopped producing spaghetti.

能发挥调理作用的补体成分是（）

A.C4a

B.C3b

C.C5b

D.C2b

E.C2a