必修4 Units1~5单元测试（人教新课标）
Unit 1
一．根据中文或首字母提示，填写所缺单词的适当形式。
1. After working hard for twenty years, he gained a great scientific a________.
2. We must take the weather into c________ first when climbing mountains.
3. C________ between people who speak different languages is difficult.
4. The actor was dressed in funny clothes, much to the ________ (娱乐) of the audience.
5. The two boys were brought up in war c________ by their grandma after their parents died.
