题目内容
（请给出正确答案）
A．His mother' s use of the washing machine
B．His father' s turning on the microwave oven.
C．His long hours of watching TV.
D．The switch on of two air-conditioners.
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A．His mother's use of the washing machine.
B．His father's turning on the microwave oven.
C．His long hours of watching TV.
D．The switch on of two air-conditioners.
A．His concern for his mother"s health.
B．His support for drinking Chinese green tea.
C．His surprise at China"s recent development.
D．His wonder at the growth of India"s IT industry.
One reason that might explain Page's sleeplessness was ______.
A．his mother's injured before he was born
B．that he had gradually got rid of the sleeping habit
C．his magnificent physical condition
D．that he hadn't got a bed
In this system, the husband lived together with ______.
A．his wife
B．his sons and daughters
C．his mother, brothers and sisters
D．his wife's brother
Chokwe Selassie is on a mission to help drivers avoid potholes (路面坑洞) .The eighth-grader got his inspiration on a recent morning, when his mother was driving him to school. Their car was damaged as it went over a huge pothole in the middle of the street in their hometown of Jackson, Mississippi. “I decided I was going to do something about the pothole problem in my city,”said Chokwe. His solution: an app that warns drivers when there is a pothole ahead.
Chokwe developed the app with his friends,“When the app detects a pothole, it is highlightedin red,” Chokwe says. “And if you get close to the pothole, your phone will warn you with a beep.” Drivers can also use the app to report any potholes they encounter, and to look for other routes they can take to avoid roads that have them.
The app relies on current available information about the streets of Jackson. “It works by using the city’s 311 call system, soit uses information already stored in a database,” Chokwe says. Throughthe call system, citizens dial 311 to report non-emergency problems—which include potholes. As Chokwe and his friends worked on the app, they also went street by street throughout the city. They determined that focusing on the 10 busiest streets in Jackson would give them a large enough sample size to test it.
Although the app isn’t yet available for sale,Chokwe is already looking for ways to improve it. The app remains limited to 10 streets in Jackson, but he hopes to add more, so that it includes every street in the city. And then he wants to go even farther. “I want to keep working on the app until it’s nationwide, ” Chokwe says.
Chokwe Selassie got the idea to develop the app from ________.
A.his own experience
B.a recent news report
C.his friends
D.his mother
When you are close to a pothole, your phone will warn you with ________.A.a voice report
B.a red light
C.a beeping sound
D.a map image
Drivers can also use Chokwe’s app to ________.A.report emergency traffic problems
B.look for information other than potholes
C.choose safer routes without potholes
D.avoid traffic jam caused bypotholes
To develop the app, Chokwe and his friends ________.A.reported potholes to 311 call system
B.conducted field trips onthe streets
C.built their own information database
D.collected samples in their neighborhood
We can learn from the last paragraph that Chokwe ________.A.is quite successful
B.is facing difficulties
C.has regained hope
D.has a great ambition
请帮忙给出每个问题的正确答案和分析，谢谢！
A．They can't decide on a video.
B．Susan's mother is going to use it.
C．Susan's mother is going to ask her to do something else.
D．The machine isn't working.
A．The machine doesn't work.
B．They will go to the cinema.
C．Lily's mother will use it.
D．Lily has to finish her assignment.
They used to go shopping in the supermarket run by a foreigner, ______.
A．Mary's mother used to
B．so used Mary's mother
C．so did Mary's mother
D．also Mary's mother
A．The machine isn't working.
B．They can't decide on a video.
C．Susan's mother is going to use it.
D．Susan has to finish her assignment.
his memories of the family farm led him into horticulture(园艺).the study habits he had acquired in the orphanage helped him a great deal because he did not care for the life outside his university， and gearhart saw many of his former classmates fall behind， then， as he puts it， he “fell in love with genetics.”
after earning his b. sc. in biological(生物的)science at penn in 1964，he moved to the university of new hampshire(新罕布什尔州)，where he got his m. sc in genetics in 1966. he received his ph.d. degree in genetics， development&embryology(胚胎学)from cornell university in 1970.
through all these years gearhart had only occasional contact with his mother . his studies had led him far from the farming concerns of his family in pennsylvania，when his mother became seriously ill，she came to johns hopkins hospital for treatment， and it was only then， in her last months of life， that gearhart felt he finally came to know the mother who had been forced to give him up so many years before.
on november 10， 1998， john gearhart reported his important findings in genetics. he is now one of the most famous scientists in the united states， a leader in the field of genetics research..
51、John Gearhart was sent to the orphanage because______.
A.his mother was ill
B.his father died
C.his father couldn't support his family
D.his mother didn't like him
52、it can be learned from the passage that ____contributed a lot to his success.
A.one of his brothers
B.his classmates in the orphanage
C.his memories of the family farm
D.his study habits developed in the orphanage
53、John Gearhart attended all the following universities EXCEPT____.
A.Cornell University
B.Pennsylvania State University
C.University of New Hampshire
D.Johns Hopkins University
54、John Gearhart is well-known for his important findings in______.
A.biology
B.horticulture
C.genetics
D.farming
55、John Gearhart didn't understand why his mother gave him up so many years before until ___
A.his mother’s death
B.his great success in his work
C.his mother's last months of life
D.his graduation from Cornell university
