David, ________ make trouble at school.

A.can't B.don't C.doesn't D.couldn't

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科目：初中英語 來源：冀教版英語九年級全冊 Unit 3 Safety 單元測試 題型：單選題

My mother bought ______ new scissors.

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科目：初中英語 來源：冀教版英語九年級全冊Unit3 Safety單元測試卷（含聽力） 題型：閱讀單選

Now more and more people buy and sell things on the Internet. They buy and sell goods to make money. So hackers(黑客) around the world are interested in this.

Hackers are often young people who love computers greatly. They use computers to get on the Internet, looking for ways to go into computer systems run by banks, homes and all kinds of offices. If they go into a computer system, they will find other people's credit cards and try to steal the numbers. With the numbers they can take the money out of the bank.

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Scientists always ask people who have computers to pay attention to hackers. They also tell people how to fight the hackers. The answer is to choose a clever password(密碼) and change it often and not to show your credit card out to anybody. If you are not careful, it's just like keeping the bank door wide open.

1.The underlined word “this” refers to .

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3.It's to find the hackers who break into your computer system.

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科目：初中英語 來源：冀教版英語九年級全冊Unit3 Safety單元測試卷（含聽力） 題型：聽短文填寫表格

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科目：初中英語 來源：冀教版英語九年級全冊 Unit 3 Safety單元測試 題型：單選題

In many eastern European counties, you are supposed to ______ your gloves before shaking hands.

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科目：初中英語 來源：冀教版英語九年級全冊Unit 4 Stories and PoemsLesson 24 Writing a Poem課時練習(xí) 題型：完成句子

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Math is very hard for me ____ ____.

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I'm sorry, your question is ____ difficult for me ____ answer.

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科目：初中英語 來源：冀教版英語九年級全冊Unit 10 Get Ready for Jobs單元測試卷 題型：完型填空

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2.A.same B.as same C.so good D.the same

3.A.because B.so C.until D.though

4.A.take B.play C.have D.choose

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9.A.art B.music C.sports D.acting

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12.A.good B.the best C.better D.best

13.A.examine B.have examined C.examining D.examined

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A.what do they think of B.how do they think of

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