假定你是李明，你的美国笔友Alex将于今年四月到杭州进行为期一个月的学习。请根据以下要点给他写封信：
1．表示欢迎；
2．月平均气温20度左右；
3．带雨伞、相机；
4．祝旅行愉快。
注意：
1．词数100词左右；
2．可适当增加细节，以使行文连贯；
3．请直接将书面表达写在背面。

A. visiting teams
B. famous players
C. things to do for the weekend
D. prices to pay for the sports events

A. was not a world-famous president
B. seemed to be an unimportant president
C. was a well-known president
D. had the same fact as Adams