Exactly______ the potato was introduced into Europe is uncertain, but it was probably around 1565.

试卷相关题目

• 1 Provide your doctor with a detailed medical history________he can give you accurate treatment.

  A.even if　

  B.in case

  C.so that 　

  D.as though

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• 2Don't be afraid of asking for help _______ it is needed.

  A.unless

  B.though

  C.although

  D.when

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• 3I was so familiar with her that I recognized her voice ______ I picked up the phone.

  A.the moment

  B.after

  C.before

  D.while

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• 4He made a promise ________he earned money, he would build a new school to help develop education.

  A.what

  B.that if

  C.that

  D.what if

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• 5________ nobody wouldn't go to the spot，he went without a second thought.

  A.While

  B.As long as

  C.Where

  D.In spite of

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• 6The meaning of the word 'nice' changed a few tines _______ it finally came to include the sense 'pleasant.' 

  A.before

  B.after

  C.since

  D.while

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• 7 Evidence came up________special speech sounds can be recognized by babies as young as 6 months old.

  A.what　

  B.which

  C.that　

  D.whose

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• 8 _______ regular exercise is very important, it's never a good idea to exercise too close to bedtime.

  A.It

  B.As

  C.Although

  D.Unless

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• 9 ______ Stephon Marbury is an American, he has become a role model among Beijing  basketball fans.

  A.As

  B.Although

  C.When

  D.Since

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• 10Catherine's mother doesn't allow her to go anywhere outside the town ________ another member of the family is along.

  A.without

  B.if

  C.unless

  D.with

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