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- 41The writer tells us _____
A.to pour dirty water into the rivers
B.to throw litter into a dustbin
C.to save water by letting it run while we are brushing our teeth
开始考试练习点击查看答案 - 42We can_____ to save paper.
A.use a paper cup
B.throw old books away
C.use both sides of paper
开始考试练习点击查看答案 - 43Which of the following is WRONG according to the writer、
A.Give your old clothes to the poor children.
B.Close the doors in winter.
C.Use a paper cup when you brush your teeth.
开始考试练习点击查看答案 - 44The main idea of this passage is how to _____ .
A.save water and electricity
B.protect the earth
C.make better use of old things
开始考试练习点击查看答案 - 45The earliest mobile phone viruses were called _____
A."Skulls"
B."Dust"
C."Skulls" and "Dust"
开始考试练习点击查看答案 - 46The earliest mobile phone viruses _____
A.were dangerous
B.were not dangerous
C.made phones stop working
开始考试练习点击查看答案 - 47What does the underlined word "multimedia" mean、
A.Photos, videos and sound.
B.Photos and videos.
C.Pocket computer.
开始考试练习点击查看答案 - 48How is the newest virus spread、
A.By playing games on phones.
B.By opening multimedia messages.
C.By calling expensive phone numbers.
开始考试练习点击查看答案 - 49What are mobile phone companies doing to stop viruses、
A.They are making fewer new phones.
B.They are putting anti-virus software on new phones.
C.They are improving mobile technology.
开始考试练习点击查看答案
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