单词拼写。根据下列句子各句句意和空白之后的汉语提示词，在横线上写出空缺处
相应单词的正确形式，每空只写一词。
1. If you _____ (按, 压) the button, the machine will start.
2. I'm trying to _____ (安排) my work so that I can have a couple days off next week.
3. Is there a _____ (联系) between your leaving home and my cooking?
4. As we know, it is very difficult to learn _____ (高等的) math well.
5. The air has less _____ (氧气) in it at high altitudes than it does at low altitudes.
6. It is bad _____ (礼貌) to spit in public places.
7. She is very _____ (挑剔的) about what she eats.
8. A lot of measures have been taken to stop rivers from being _____ (污染).
9. They have been _____ (争吵) with each other for almost two hours.
10. He tied the bandage _____ (紧紧地) so that it would stay in place.