第四部分书面表达（共两节，满分40分）
第一节完成句子（共10小题；每小题1.5分，满分15分）
阅读下列各小题，根据括号内的汉语提示，用句末括号里的英语单词完成句子。
71．AIDS is said______（是）the biggest health challenge to both men and women in that area over the past few years.（be）
72．So tired ______（他觉得）that he fell asleep soon.（feel）
73．“It’s a new term and a new day. I wish I ______（能适应新环境）as soon as possible，”15-year-old Li Mingyang said.（adapt）
74．I think it important ______（与我们的朋友保持联系）.（touch）
75．______（她生病的原因）was that she ate something that had gone bad.（why）
76．—Professor Crown，I attended your lecture on ecology at Berlin University last year. It was wonderful!
—Thank you. But it______（一定是）more than two years ago，I think.（must）
77．Another colleague who is known to have stolen things in the past______（怀疑）having stolen the camera.（suspect）
78．______（再给我五分钟），and I’ll finish checking the report.（give）
79．It was ______（你迟到）made the teacher very angry. You must come earlier next time!（come）
80．The English teacher ______（刚才提到过的）is said to retire next term.（refer）
[答案]
，所以函数在x=1处不连续．
，则函数在x=1处连续．