1) the cause for leaving;
2)the days: from 16th to 21st;
3) catch up on the lesson after returning school.
You should write about 100 words on ANSWER SHEET 2. Do not sign your own name at the end of the letter. Use "Wang Ling" instead.(10 points)
【参考答案】
[参考范文]Dear Miss Jan, My sister called me last night, and she......