---Sorry, Professor Smith. I didn't finish the assignment yesterday.
---Oh, you have done it as yesterday was the deadline.
A. must B. mustn't C. should D. shouldn't
Every few years, the coal workers their lungs X-rayed to ensure their health.
A. are having B. have C. have had D. had had
If our parents do everything for us children, we won't learn to depend on
A. themselves B. them C. us D. ourselves
It took us quite a long time to get to the amusement park. It was journey.
A. three hour B. a three-hours C. a three-hour D. three hours
Sean has formed the habit of jogging the tree-lined avenue for two hours every day.
A. between B. along C. below D. with
假设你是新华中学的学生李华，你和在上海上学的英国朋友Tom约好下周末去北京旅游，但你因故不能赴约。请根据以下要点用英语给他写一封电子邮件：
1.表示歉意；
2.解释原因；
3.另约时间。
注意：1. 词数120~150；
2.可适当增加细节。
