The reason is __________ he is unable tooperate the machine. 

试卷相关题目

• 1This book will show you __________ canbe used in other contexts.

  A.how you have observed

  B.what you have observed

  C.that you have observed

  D.how that you have observed

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• 2The freezing point is the temperature__________ water changes into ice.

  A.at which

  B.on that

  C.in which

  D.of what

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• 3The wolves hid themselves in the places__________ couldn、t be found.

  A.that

  B.where

  C.in which

  D.in that

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• 4Is this the factory __________ he workedten years ago、

  A.that

  B.where

  C.which

  D.the one

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• 5Is this factory __________ some foreignfriends visited last Friday、

  A.that

  B.where

  C.which

  D.the one

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• 6I、ll tell you __________ he told me lastweek.

  A.all which

  B.that

  C.all that

  D.which

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• 7That tree, __________ branches arealmost bare, is very old.

  A.whose

  B.of which

  C.in which

  D.on which

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• 8______ more attention,the trees couldhave grown better.

  A.To give

  B.Having given

  C.Given

  D.Giving

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• 9The first textbooks ______ for teachingEnglish as a foreign language came outin the 16th century.

  A.to be written

  B.written

  C.being written

  D.having written

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• 10The missing boys were last seen ______near the river.

  A.to play

  B.play

  C.to be playing

  D.playing

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