Ⅰ. 根据句意及首字母或汉语提示完成单词(10分)
1. I like coffee with sugar because it t _____ better.
2. We often do physics experiments in the l _____ .
3. True friends should always be_____ (真诚的) with each other.
4. The_____ (主要的) idea of this article is to tell students how to set good habits.
5. It’s said that many people died of _____ (癌症)every year.