-Have you found the poor cat yet?-Yes．But it was when we found it．The bad weather killed it( )A．dyingB．diedC．deadD．die 题目和参考答案——青夏教育精英家教网—

Imagine having a ear made out of an apple．It seems like a crazy idea from a horror movie．But it could happen in the near future．
Canadian biophysicist Andrew Polling used an apple to grow a human ear．He think fruit and vegetables can be used to cheaply repair human body parts in the future．
Scientists have been trying to grow organs （器官） in labs to replace our old ones．But it is a hard job．For example，liver cells （肝细胞） can grow in a lab，but he cells still need things like blood vessels （血管） to actually work．These things have to grow inside a scaffold（支架）．
In the past，scientists have used man-made materials，animals parts and even dead people as scaffolds．But that has proved to be difficult and expensive．
Polling and his team，however，found the apple to be a cheap and easy-to-use scaffold．
They first cut an apple into the shape of an ear．Then they used a special way to take out the apple's cell and make it a scaffold．The team then added human cells to the apple，and watched it grow．
"You can implant these scaffolds into the body，and the body will send in cells and a blood supply and actually keep these things alive，"Polling said during a Ted Talk speech．
The team put the apple scaffold inside a living mouse and the mouse's cells slowly took over the pieces of apple．
Now Polling is thinking of other fruit，plants or vegetables to use．
He says that the shape of flower petals could be perfect for repairing skin．And asparagus（芦笋） could fix a broken spine（脊柱）．
Now，Polling and his team are trying hard to put these crazy ideas into reality．
42．Polling's idea of man-made ear seems crazy because he useDas scaffolds．
A．animal parts
B．dead people
C．man-made materials
D．ordinary apples
43．The underlined word"implant"in Paragraph 7 probably meansB．
A．pick
B．put
C．produce
D．protect
44．Which is the right order of making an ear out of an apple according to the passage？C
a．put the apple scaffold inside a mouse
b．add human cells to the apple scaffold
c．cut an apple into the shape of an ear
d．make the apple ear a scaffold
e．take out the apple's cells in a special way
A．a-b-c-d-e B．b-c-d-a-e C．c-e-d-b-a D．c-d-a-e-b
45．From the last three paragraphs，we can infer that Pelling will experiment with other fruit，plants or vegetablesD．
A．to make human ears
B．to repair burnt skin
C．to fix a broken spine
D．to make human body parts．

17．--How often does Lara play the trumpet？
--_____ once or ________ a week，I'm not sure．（　　）

A．

May be，twice

4．How，I，English，am，practise，going，to，my （？）
How am I going to practice my English？．

14．Most of the students thought Johnstole　（偷） David's money yesterday．

1．Little jenny often feels lonely because she has few friends to play with．

18．The twin brothers usually walk to school．（改为同义句）
The twin brothers usually go to schoolon foot．

19．

Twinkle，Twinkle Little Star is a lovely song for children，but it has two misunderstandings．First，stars aren't little．Some may be Earth-sized，but most are bigger than Jupiter，the largest planet in the solar system．Second，they don't twinkle； they shine．And the brightness and color of the light from each star provide information about its temperature，size and even its age．
Viewing the stars from Earth is a bit like looking at them through a water filter because the air is thick compared to the emptiness of space．What is more，air is always moving，so starlight appears to be moving，too．The air also makes stars appear dimmer（暗淡的） than they would be if we could see them from space．
If you stop and examine the sky on a dark and moonless night，it's easy to find color differences among stars．The color of a star is a signal of its surface temperature．The hottest stars are blue，and the next hottest are white．Yellow stars like the sun are next，while red stars are the coolest of the visible stars．Many red stars are so dim that people can't see them at all，and some stars hardly send out any light at all．One reason that stars differ in brightness is that hotter stars produce more energy than cooler ones，but another important reason is that some are much bigger than others．
Some stars appear brighter to human beings simply because they're closer．Astronomers rank the brightness of stars which are seen form Earth by giving them a name known as magnitude（光度）----the smaller the magnitude，the brighter the object．They have also designed a number that ranks stars according to how bright they are when compared to each other．With a magnitude of minus 26.7，the sun is the brightest object in the sky．
39．From the song quite familiar to children，the writer wants to prove thatC．
A．most stars are smaller than Jupiter
B．Jupiter is bigger and brighter than Earth
C．stars are very large and always shine brightly
D．starlight's brightness and color are the signs of its temperature
40．The underlined phrase"a water filter"in Paragraph 2refers toD．
A．the earth
B．stars
C．the rain
D．the air
41．Magnitude is designed to seeD．
A．how far a star is from Earth
B．how bright a star is compared to other stars
C．how far a star is from other stars
D．how bright a star is seen from Earth
42．Which is the best title of this passage？A
A．What do stars look like？
B．Which song do children like best？
C．How to view the stars from Earth？
D．Why are many stars so dim at night？

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