根据首字母及汉语提示，完成下列单词的拼写，使句意明确，语言通顺。

1. Jack wants to go around the _____ (世界).

2. These _____ (树叶) are green in summer and they're beautiful.

3. She is a teacher. She t_____ us English.

4. We use a c_____ to take pictures.

5. The girl is from Xinjiang. She is p_____ beautiful.

单分型面注射模的结构主要特点是（）。

A.一个分型面

B.一个型腔

C.多个分型面

D.多个型腔