A number of theories have been [<u>proposed</u>] to explain the situation.

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• 1[<u>Eventually</u>], she got a job and moved to London.

  A.Finally

  B.Certainly

  C.Luckily

  D.Naturally

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• 2She can be [<u>relied</u>] on in a crisis.

  A.looked after

  B.depended on

  C.believed in

  D.turned on

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• 3We [<u>explored</u>] the possibility of expansion at the conference.

  A.offered

  B.included

  C.accepted

  D.investigated

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• 4Greene spent a [<u>brief</u>] time at Cambridge.

  A.hard

  B.good

  C.short

  D.long

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• 5My doctor said I should [<u>vary</u>] my diet more.

  A.prepare

  B.cook

  C.choose

  D.change

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• 6Things have changed [<u>a lot</u>] since I was a child.

  A.gradually

  B.suddenly

  C.frequently

  D.greatly

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