鸦片战争后，中国历史进人旧民主主义革命时期，其主要依据是（  ）

A．中国革命任务的变化

B．中国革命主力的变化

C．中国革命形式的变化

D．中国革命领导阶级的变化

单词拼写。

1. Knives are used for              (切割) things.

2. I plan to improve my              (发音) by having conversations with native speakers.

3. The whole room was really              (充满) of smoke.

4. She's been              (结婚) for two years.

5. Tom,              (翻译) these sentences into Chinese.