It still remains a question _____ life exists on any other planet in the solar system.

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• 1— ________ I watch TV, I'll turn it down and never make any noise. —Good. _______ you're doing should never disturb others. ________ how important you're, never forget about how others feel.

  A.Whatever; Wherever; No matter

  B.Whenever; Whatever; No matter

  C.Whether; Whatever; /

  D.No matter; Wherever; /

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• 2_____ his dream of going to college will come true is uncertain.

  A.That

  B.Even if

  C.If

  D.Whether

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• 3_____ the city's public school system should be open to the children of migrant workers has become the focus of discussion.

  A.That

  B.What

  C.Whether

  D.If

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• 4______ is estimated that a round-trip to Mars would take more than a year.

  A.That

  B.what

  C.There

  D.It

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• 5______ is a fact that English is being accepted as an international language.

  A.It

  B.This

  C.That

  D.There

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• 6______ young people see and hear in the media helps them to figure out how the world works.

  A.Which

  B.That

  C.What

  D.How

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• 7______ Micro-letters (Weixin) will be charged has not been decided yet.

  A.That

  B.Whether

  C.Which

  D.Since

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• 8______ in the regulations is that you _______ other people the password of your e-mail account.

  A.What is required; not tell

  B.As is required; shouldn't tell

  C.It is required; not tell

  D.It requires; shouldn't tell

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• 9It isn't decided yet _______ we will attend the meeting.

  A.if

  B.why

  C.that

  D.whether

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• 10It never occurred to me ________ you could succeed in persuading him to change his mind.

  A.which

  B.that

  C.what

  D.if

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