在空格内填入适当的词，使其内容通顺，每空格限填一词，词首字母已给。

1. What do you want to do in summer h______________.

2. Fifteen minutes means a q_____________.

3. Taiwan is the largest i_____________ of China..

4. The p____________ of China is the largest in the world. It's over 1,300 million.

5. His t_____________ is a little high. I think he has a headache.

6. Jim is an e_____________ student. He often does very well in all the subjects.

两个牙的牙根发育完成以后发生粘连而形成的是（）

A．融合牙

B．双生牙

C．结合牙

D．牙内陷

E．多生牙