The skin, an ____ part of your body and its largest organ, ____ as a barrier against diseases.

试卷相关题目

• 1A series of debates between the major candidates ____ scheduled last week.      

  A.is

  B.are

  C.was

  D.were

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• 2— Look! How tall the tree is!   — Yes. It ______ nearly 20 metres.  

  A.measures

  B.is measured

  C.is measuring

  D.measured

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• 3Every time I ______ there, I will buy him something to eat.

  A.went

  B.will go

  C.go

  D.have gone

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• 4We live day by day, but in the great things, the time of days and weeks ________ so smallthat a day is unimportant.

  A.is

  B.are

  C.has been

  D.have been

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• 5So quickly ____________ that what is a possibility today may be a reality tomorrow.

  A.is science advancing

  B.science is advancing

  C.will science advance

  D.science will advance

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• 6We live day by day, but in the great things, the time of days and weeks____ so small that a day is unimportant.      

  A.is

  B.are

  C.has been

  D.have been

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• 7Although it ____ in the desert most of the year, people still live there.

  A.doesn't rain

  B.didn't rain

  C.hasn't rained

  D.hadn't rained

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• 8Each time you________, you shouldn't lose heart to start again.    

  A.will fail

  B.failed

  C.will have failed

  D.fail

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• 9More than one student_______absent from Mr.Smith's class.

  A.is

  B.are

  C.has

  D.have

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• 10My money __________.I'd better go to the bank to draw some in case I_____ none in hand.  

  A.has run out; will have

  B.is running out; have

  C.has been run out of; will have

  D.is running out of; have

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