Just as the tree is the unit of a forest and the book the unit of a library, ______ the molecule is the unit of matter.

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• 1 —I got an email from Susan,  ______ said she was going abroad for sightseeing. —Fantastic! That's what she has been dreaming of.

  A.which

  B.she

  C.who

  D.it

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• 2Imagine life as a game ______ you are playing with five balls. You name them---work, family, health, friends and spirit.

  A.where

  B.that

  C.as

  D.which

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• 3_____ what he can do. He might get a job tomorrow.  He might stay out of work for weeks.

  A.We didn't know

  B.He doesn't know

  C.There is no knowing

  D.It was known that

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• 4He is a man of great knowledge, _____ much can be learned.

  A.in whom

  B.about whom

  C.from whom

  D.of whom

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• 5The factory _____ I am going to is the place _____ my mother used to work many years ago.

  A.where, where

  B.where, which

  C.which, where

  D.that, which

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• 6— Did you miss your football match yesterday? — No, I didn't. Hardly had I turned up at the sports field _______ the match began.

  A.when

  B.than

  C.before

  D.since

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• 7It was not until the age of 60 ______ William Steig discovered his talent for writing children's books.

  A.after

  B.that

  C.since

  D.when

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• 8They talked a lot about the things and persons ________they saw in the Vancouver Winter Olympics.

  A.which

  B.that

  C.whom

  D.what

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• 9______ is well-known, China is a ______ country.

  A.It; developing

  B.As, developed

  C.That; developing

  D.As; developing

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• 10The weight of your bicycle is twice ______ that of mine.

  A.as many as

  B.as large as

  C.as heavy as

  D.as more as

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