Last month, American scientists started working on _____ project aimed at improv

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Last month, American scientists started working on _____ project aimed at improving _______ ability to predict earthquake.

A．the; a

B．a; an

C．the; an

D．a; the

答案

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略

举一反三

No one believes the small dark lab is ___ home to so many great inventions at___ first sight.

A．the; the

B．不填；the

C．the；不填

D．不填；不填

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______ World Exposition in 2010 is the first registered World Exposition in ______ developing country.

A．/; a

B．The; a

C．The; /

D．/; the

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Since its entry into ________ Chinese market, Google has been enjoying ________ legal market access and national treatment.

A．the; a

B．不填; 不填

C．a; the

D．the; 不填

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Developing a low-carbon economy is__________global topic and the world needs
__________clean revolution with participation from everyone, decision makers to the children.

A．a；the

B．a；a

C．the；a

D．／：the

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Dina El-Mogazi, ____ director of _____ Campus Greening Department, says courses in ____ variety of disciplines(科目)will achieve the requirement.

A．/;the;/

B．the;/;a

C．/;the;a

D．the;the;the

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