Scientists have found no ________of life on Mars so far,though great efforts have made on the research.

试卷相关题目

• 1Yang Liwei，China's first spaceman，prepared carefully for going to space so that he could be sure of success at his first _________.

  A.experiment

  B.flight

  C.attempt

  D.try

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• 2You can't see the___________ now for they are having a meeting at the moment.

  A.editors-in-chief

  B.editor-in-chiefs

  C.editors-in-chiefs

  D.editor-in-chief

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• 3Who would send so many flowers on such an ordinary day? It makes no______.

  A.difference

  B.sense

  C.progress

  D.meaning

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• 4One should have a _______ of right and wrong.

  A.feeling

  B.knowledge

  C.sense

  D.idea

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• 5—Who did you stay with ? —_____________.                            

  A.Mr. Green's

  B.The Greens

  C.Greens

  D.The Mr. Green's

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• 6As is well known to us all, in China pigeons stand for peace. However, in India the wheel in its national flag is also a _______of peace.

  A.symbol

  B.sign

  C.mark

  D.example

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