Lucy has a great sense of humor and always keeps her colleagues       with her stories.

   A. amused         B. amusing         C. to amuse           D. to be amused

 I had great difficulty       the suitable food on the menu in that restaurant.

   A. find            B. found           C. to find             D. finding

 The church tower which       will be open to tourists soon. The work is almost finished.

   A. has restored     B. has been restored    C. is restoring        D. is being restored

 In ancient times, people rarely travelled long distances and most farmers only travelled              the local market.

   A. longer than      B. more than          C. as much as        D. as far as

 ---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。