题目

用括号内所给单词的适当形式填空。 1. It’s very important to teach the children about road __________(safe). 2. It was __________( pain) to admit that I was wrong. 3. Children should be taught how to spend their pocket money __________( wise). 4. This book is really worth __________( read ). 5. The __________( four ) month of a year is April. 答案：1. safety  2. painful  3. wisely 4. reading 5. fourth4．根据下面的两种移动电话计费方式表，考虑下列问题．方式一方式二月租费20元/月50元/月本地通话费0.3元/分钟0.2元/分钟（1）一个月本地通话时间200分钟和400分钟，计算按两种移动电话计费方式各需要交费多少元？（2）会出现两种移动电话计费方式收费一样吗？如果会，请计算出此时的通话时间？如果不会，请说明理由；（3）请你说明在怎样选择计费方式下更省钱？