书面表达（满分15分）

五月四日，高三年级一班和二班之间将进行一次有关环保问题的演讲比赛（a talk show on environment protection）。在这之前，二班将邀请清华大学的Dr Li做相关内容的报告。

假定你是二班的班长，请你草拟一个有关报告会的口头通知。

注意：1.内容应包括提示及表格内的全部要点；

2.词数在100左右；  3.开头已为你写好。

我现在胃不舒服，一定是刚才鸡肉吃得太多了。( must have done )

当父亲进来时，男孩假装正在读书。 ( pretend to be doing )

在过去的二十年中，我们的社会发生了很大变化，我们的饮食习惯也变了。( so倒装 )

如果一个厨师被发现在厨房里吸烟，他会被立刻开除。( be caught doing )

The summer is already here, and it _____ to be a most severe one.     

According to the rules, students must not ____ their books during examinations.

---Why didn’t you go to yesterday’s meeting?

---I would have but I ______ too busy working on the important experiment.

---- Could I have a word with you?

---- Sorry, I am busy ______. Shall we do it later?

-----Hi, Nancy, I didn’t know you had come back. So have you graduated from college?

---- Yes. I _____ French for 5 years in Nanjing.