题目内容：

根据中文提示写出单词或词组，使句意完整、正确。

1.---Do you often play computer games?

---No. My mom ________________(允许) me to do that only on weekends.

2.---Look, Mike. Are those doctors from Africa?

---No. They are _________(德国人). They have just come back from Africa.

3.There are some ____________(机器) making loud noise.

4.Sleeping too late  ________________ (有害的) your health.

5.As we know, the plants are hard to live in a _____________(干燥的) place.