13. (2014 •河北) Don’t forget thanks when other people help you.
A. accept B. to accept
C. say D. to say
13. D 解析：don't forget to do sth.意为“不 要忘记做某事”，先排除A和C.句意：当 别人帮助你时，不要忘记道谢。再根据say thanks的固定搭配可知答案为D.
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19. (2014 •广东) Most people are building a paper factory near here. They are worried that the river will get polluted.
A. for B. with
C. against D. beyond
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4. (2015 •湖北恩施) So many trees and beautiful flowers in this area in 2014.
A. were planted B. was planted
C. are planted
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16. (2014 •黑龙江级化) We should do what we can our environment.
A. protect B. to protect
C. protecting
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8. (2015 •福建福州)
-So beautiful flowers!1 can't decide for my mom.
For Mother's Day,it can't be better to take some carnations (康乃馨) .
A. when to choose B. which to choose C. how to choose
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2. (2015 •广东) -So far,Su Bingtian is the only Chinese that finished the 100-meter race in less than 10 seconds.
- he runs!
A. How slow B. How fast
C. What a slow D. What a fast
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9. (2015 •广东广州) --will the invitations be sent to our guests?
--In three days.
A. How often B. How soon
C. How long D. How far
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7. (2015 •福建厦门)
—What will happen we hold the party next Monday evening?
-Most of our classmates will not come.
A. if B. though
C. since
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When a computer works on a group of programs,it can get very hot. Cooling the computer can cost a lot. So some scientists wonder what would happen if the heat from the computer could be used.
Large Internet companies (公司) such as Google and Microsoft have thousands of computers. As these computers deal with information,they produce lots of heat,so they need huge cooling systems (系统) . These systems send the heat into the air.
A company in Holland (荷兰) thinks paying to make the computers work and then paying again to cool them are a waste of energy. So the company developed a special device—the e-Radiator.
Boaz Leupe,head of the company,says that the e-Radiator works as a heating system and saves money. He explains that the energy is used twice—once to heat the home and once to cool the computer and that the users don't have to pay to cool their computers.
Five homeowners in Holland are testing the heating system in their homes.
“We pay for the computer using,so, in that way,homeowners get heating for free,”Boaz says.
Jan Visser is one of the homeowners. “If you use the computer more,the e-Radiator produces more heat, ”he says. “It cannot provide enough heat if you don't use your computer often. ” But he is ready to try it. It's a great help for his family.
The company says e-Radiators produce heat temperatures of up to 55。C. It says the system could save its users about $ 440 a year.
1. Before the e-Radiator appears,usually the heat of a computer .
A. is sent into the air
B. helps the five homeowners
C. is used twice
D. makes the computer work better
2. The e-radiator is mainly used .
A. to drive the computer
B. to help Microsoft
C. to heat the computer
D. to provide heat
3. The Chinese meaning of the word “device” in this passage is probably “ ”.
A. 节能 B. 实验
C. 仪器 . D. 开关
4. The best title of the passage may be “ ”.
A. An environment problem
B. A new way to heat homes
C. The future computers
D. The energy to be wasted
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