[题目] –Linda, you good at geography?–Yes. Geography is my favorite subject.A. are B. do C. did D. Have 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】 –Linda, _______ you good at geography?

–Yes. Geography is my favorite subject.

A. are B. do C. did D. Have

【答案】A

【解析】

试题分析：句意：---Linda，你擅长地理吗？---是的，地理是我们最喜欢的科目。根据动词短语be good at表示擅长……。根据题意可知用一般疑问句，故用be提前。结合语境，故选A。

练习册系列答案

—Yes. He needs to eat more food.

A. tall B. heavy C. fat D. thin

【题目】Why Do People Blink (眨眼) Their Eyes?

People blink their eyes tens of thousands of times every day. Scientists have long believed blinking was an involuntary movement and served mainly to keep the eyeballs wet. But a new study suggests it has a more important purpose.

An international team of scientists from the University of California at Berkeley studied the blinking of human eyelids. The journal Current Biology published their findings. The team said they found that blinking “repositions our eyeballs so we can stay focused” on what we are seeing. They said that when we blink our eyelids, the eyes roll back into their sockets—the bony area that surrounds and protects the eyes. However, the researchers found the eyes don’t always return to the same position (位置). They said this causes the brain to tell the eye muscles (肌肉) to reorganize our eyesight.

Gerrit Maus is the lead writer of the report. He serves as an assistant professor of psychology at Nanyang Technological University in Singapore. Maus said, “Our eye muscles are quite sluggish (迟缓的) and imprecise (不精确的), so the brain needs to constantly adapt (改编) its motor signals to make sure our eyes are pointing where they should be. Our findings suggested that the brain measures the difference in what we see before and after a blink, and orders the eye muscles to make the needed corrections.” The researchers said that without such corrections our surroundings would appear unclear and even jumpy. They said the movement acts “like a steadicam (摄影稳定器) of the mind.”

The researchers said they asked volunteers to sit in a dark room while storing at a small dot on a flat surface. They used special cameras to follow the volunteer’s blinks and eye movements. After each blink, the dot was moved one centimeter to the right. The volunteers did not notice this, but the brain did. It followed the movement and directed the eye muscles to refocus on the dot. After the dot was moved in this way 30 times, the volunteers’ eyes changed their focus to the place where they predicted it would be.

Professor Maus said. “Even though the volunteers did not consciously register that the dot had moved, their brains did, and adjusted (调整)with the corrective eye movements. These findings add to our understanding of how the brain constantly adapts to (适应) changes directing our eye muscles to correct for errors in our bodies’ own hardware.”

【1】According to the new study, blinking eyes can ________.

A.serve keep the eyeballs wetB.reposition eyeballs to stay focused

C.consciously correct eye movementsD.make our eyes adapt to motor signals

【2】From the experiment, we can learn that ________.

A.the brain directed the eye muscles to refocus on the dot

B.volunteers could see the moving dot with special cameras

C.the eyeballs could stay in the place as they were predicted

D.volunteers were aware of the dot’s movements to the right

【3】The underlined word “register” in Paragraph 5 probably means ________.

A.reasonB.refocusC.realizeD.reserve

【4】This passage shows that ________.

A.eye muscles are quite inactive and imprecise