广东省10-11学年高一下学期期末复习检测（语法填空）

广东省10-11学年高一下学期期末复习检测（语法填空） 第二节 语法填空（共10小题，每小题1.5分，满分15分） 阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡标号为31~40的相应位置上。 Do you ever wonder why you yawn? Why do you open your mouth wide and take a deep breath? Well, a scientist at the University of Maryland is searching for the answer. Professor Robert Provine has been studying yawning for the past two years. But he says he still does not know 31 people yawn. In fact, no one seems to know much about it. Professor Provine’s students have helped him find out more about yawning. They agreed to 32 (watch) while sitting alone in small rooms. In the rooms, they watched television programs, or pictures of people yawning. Or they just sat and 33 (think) about yawning. Students also kept records of when they yawned throughout the day. The professor says he has learned 34 number of things from these experiments. He says yawning seems linked in some way to sleeping. His students yawned most just bef