注意：
1）词数100左右；
2）可以适当增加细节，以使行文连贯；
3）开头和结尾己给出，但不计入总词数。
Dear Andy,
I'm glad to hear that you are coming to study with us for a year as an exchange student.
Looking forward to meeting you.
Yours,
Li Hua
I'm glad to hear that you are coming to study with us for a year as an exchange student.Please allow me to give you some information that may help to make your stay here more pleasant.
First,the weather will be very changeable in the
