进口地海关无法解决的归类问题，应报()明确。

A、国务院

B、国家税务总局

C、海关总署

D、财政部

根据句意及首字母提示补全所缺单词。

1. S____________ skaters have been skating for the whole five hours.

2. Their school is giving a concert to r____________ money for people in Wenchuan earthquake.

3. — Can you see a____________ in the classroom?

    — No, I can't. I think they're having a meeting on the playground.

4. — What is the most c____________ hobby among these kids?

    — It's flying kites.

5. My mother bought a new p____________ of shoes for me yesterday.