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科目： 來源：不詳 題型：單選題

Jumping out of _______ train running at a speed of 200 kilometers per hour is quite _____ dangerous practice.
A．/; theB．/; aC．a(chǎn); aD．the; the

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科目： 來源：不詳 題型：單選題

He’s so ill that his father has to send for _______ doctor.
A．oneB．someC．a(chǎn)D．the

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科目： 來源：不詳 題型：單選題

He was ______ medical student before he turned _______ engineer.
A．a(chǎn); anB．the; theC．a(chǎn); /D．/; an

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科目： 來源：不詳 題型：單選題

--- Really? Who will give ______ lecture? What is it about?
--- Professor Chen, ______ President of Peking  University, about pollution.
A．the; aB．a(chǎn); theC．the; 不填D．a(chǎn); 不填

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科目： 來源：不詳 題型：單選題

--- Do you take ______ sugar in your tea?
--- I used to, but now I’m on ______ diet. I’m trying to lose weight.
A．the; theB．不填; aC．不填; 不填D．the; a

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科目： 來源：不詳 題型：單選題

However, in ______ recent years, Niagara Falls have come to be appreciated more for their natural beauty as ______ wonder of nature.
A．不填; a B．the; theC．不填; theD．the; a

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科目： 來源：不詳 題型：單選題

The invention of_________ paper was a great contribution to________human civilization.
A．a(chǎn);aB．the;theC．/;/D．the;/

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科目： 來源：不詳 題型：單選題

This area experienced.____ heaviest rainfall in _____month of May.  
A. 不填; A.               B. a; the                  C. the; the              D. the; a  

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科目： 來源：不詳 題型：單選題

We can never expect____bluer sky unless we create____ less polluted world. 
A．a(chǎn); aB．a(chǎn); the
C．the; aD．the; the

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科目： 來源：不詳 題型：單選題

— Is Mr Smith rich?  
— Yes, very rich. When he worked in ________town, he earned a lot. Now he has a big farm in ________ country.  
A．a(chǎn)t; theB．/; /　　　　　　C．/; theD．the; /

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