根据句意及单词的首字母完成句子

1. -I'm hungry now，mum. -You can find some food in the k       .

2. There is a p       on the wall. It says Jacky will have a concert in our city.

3. Tom didn't go to bed until he finished the t         .

4. Sorry, I can't go to the party. I have to b        my little brother.

5. He has p        with English.

关税壁垒通常是指（）

A．高额的进口税

B．高额的出口税

C．高额的国境税

D．高额的附加税