2020-2021学年高一英语牛津译林版必修第三册Unit 4 Period Four Writing 课时作业

Period Four　Writing Ⅰ.语篇填空 Why do many of us find 1.　　　　　　 difficult or impossible to fall asleep in a bed other than our own? Is it because the bed is uncomfortable? According to a new study 2.　　　　　　(publish) in Current Biology, a significant reason is 3.　　　　　　 the scientists call “first night effect”. They believe that one side of the brain acts as a “night watch” to warn us about potential dangers. It forces us 4.　　　　　　 (stay) awake on the first night in a new environment.  For the study, 35 young volunteers 5.　　　　　　(ask) to sleep in a sleep lab for several days. Meanwhile, researchers watched their brain activities.  According to the researchers, on their first night, the left brains were 6.　　　　　　　　 (active) than the right brains and people had a hard time sleeping. However, left-brain activity decreased as days went by, 7.　　　　　　 (fall) even to the point of complete calm. In this process, the participants got an increasingly better sleep experience.  The 8.　　　　　　 (finding) suggest