用所给单词的适当形式填空。

1. Peter likes matchbox covers. He has a large ____ (collect).

2. The little boy is ____ (interest) in model planes.

3. The Spring Festival is as ____ (excite) as Christmas.

4. Life is much ____ (difficult) for them than before.

5. Please help ____ (you) to some chicken, boys and girls.

乙型溶血性链球菌是临床化脓性感染常见致病菌，另外还可引起其他疾病

引起的变态反应性疾病是（）

A.扁桃体炎

B.咽峡炎

C.猩红热

D.风湿热

E.类风湿性关节炎