题目内容

—So you gave her your phone?

—______she said she'd return it to me when she could afford her own.

A. My pleasure B. Not exactly C. No doubt D. All right

 

B

【解析】句意:“所以你把你的手机给她了?”“事实上不是,她说她自己能买得起的时候就把它还给我。“Not exactly表示”不完全如此“。My pleasure”不客气”,为道谢的答语;No doubt“毫无疑问”;Allright“行,好”,均不符合语境。

 

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Scientists have long puzzled over how iguanas, a group of lizards(蜥蜴) mostly found in the Americas, came to live in the isolated Pacific islands of Fiji and Tonga. Some scientists used to suppose that they must have traveled there on a raft, a journey of around 5,000 miles from South America to the islands. There are documented cases of iguanas reaching remote Caribbean islands and the Galapagos Islands on floating logs. But new research in January by Brice Noonan and Jack Sites suggested that iguanas may have simply walked to Fiji and Tonga when the islands were still a part of an ancient southern supercontinent.

The ancient supercontinent was made up of present-day Africa, Australia, Antarctica and parts of Asia. If that’s the case, the island species would need to be very old. Using “molecular (分子) clock” analysis of living iguanas’ DNA, Noonan and Sites found that, sure enough, the lineage of iguanas has been around for more than 60 million years—easily old enough to have been in the area when the islands were still connected by land bridges to Asia or Australia.

Fossils (化石) uncovered in Mongolia suggest that iguanid ancestors did once live in Asia. Though there’s currently no fossil evidence of iguanas in Australia, that doesn’t necessarily mean they were never there. “The fossil record of this continent is surprisingly poor and cannot be taken as evidence of true absence,” the authors write.

So if the iguanas simply walked to Fiji and Tonga from Asia or possibly Australia, why are they not also found on the rest of the Pacific islands? Noonan and Sites say fossil evidence suggests that iguana species did once inhabit other islands, but went extinct right around the time when humans settled in those islands. But Fiji and Tonga have a much shorter history of human presence, which may have helped the iguanas living there to escape extinction.

The researchers say that their study can’t completely rule out the rafting theory, but it does make the land bridge theory “far more reasonable than previously thought.”

1. What did some scientists previously believe about the iguanas?

   A. They were once discovered in America.     

B. They traveled by raft to Fiji and Tonga.

   C.  They could survive in poor living conditions.

D. They moved to Fiji and Tonga from Australia.

2.According to Noonan and Sites, 60 million years ago ____.  

A. the land of the world was a supercontinent  

B. Fiji and Tonga were connected to Asia or Australia

C. Africa, Australia and America were a continent

   D. iguanas walked to Fiji and Tonga from Africa

3.The underline word “lineage” in Paragraph 2 probably refers to ____.

   A. conditions in which creatures can survive

B. the change in ancient plants and animals.

C. the line of generations of an ancestor

D. the habitat of a type of an ancient animal

4. What is the main topic of this passage?  

A. The life span of animals living on the ancient supercontinent.

B. The two islands being home to several iguana species in the Pacific region.

C. The fossil evidence suggesting iguanas’ ancestors’ swimming to Fiji and Tonga

D. By raft or by land — how did iguanas reach the tiny Pacific islands?

 

What would you do if you were a fifth grader facing a huge homework load every night, and you found out that there was a machine that would do all the work for you? That's the situation presented to Sam, Kelsey, Judy and Brenton in Dan Gutman's entertaining new book for young readers, The Home Machine.

The four children, all fifth graders in Miss Rasmussen's Grand Canyon School, are as different as any other 11-year-old child could be, but they have one thing in common — all are somewhat separated from their classmates. Sam is a newcomer and has had his share of school trouble before; Kelsey quietly carries her pain at losing her father; Judy's sense of justice always annoys others; Brenton is the smartest child in the school, so smart that even his parents and teachers have trouble keeping up with him. When Brenton and his three classmates are put into the same study group by their teacher, the others discover that Brenton has made a time-saving gadget(装置) to do homework for him. While the boy is perfectly able to do his homework himself, Sam, Kelsey and Judy can use the help.

Having perfect grades is something new for these three, and as they meet every day to "do homework", they find that they're learning a lot about each other. Such a good thing can't last though, and when a secret man starts trying to get in touch with them, they begin to get nervous. Soon there's an even more frightening problem ― why can't the Homework Machine be turned off?

Told in different voices as all the children make statements to the Grand Canyon Police, the story develops in an interesting fashion. Gutman is a gifted writer who has written dozens of children's books, each with a funny and impressing table that should be equally liked by boys and girls.

1. What is one common thing that all the four children have to deal with at school?

A. Getting along with their classmates.

B. Doing their homework by themselves.

C. Overcoming difficulties on their own.

D. Catching up with others to get good grades.

2. Which of the following words best describe Brenton?

A. Strange and nervous.B. Quiet and smart.

C. Brave and special.D. Clever and helpful.

3. Why did the children get frightened?

A. They lost touch with each other.

B. They were questioned by a strange man.

C. They had no idea how to stop the machine.

D. They were tracked down by the police.

4. This passage most probably comes from .

A. a student's diaryB. a book reviewC. a school reportD. a science story

 

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