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.

现代人种出现于人类发展过程中的哪一个时期( )

A．早期猿人

B．晚期猿人

C．早期智人

D．晚期智人