We can never expect bluer sky unless we create less polluted wor

题型：不详难度：来源：

We can never expect bluer sky unless we create less polluted world.

A．a; a

B．a; the

C．the; a

D．the; the

答案

解析

根据句意，“a bluer sky;”“ aless polluted world.”为可数名词且表示广泛指，所以都用不定冠词。

举一反三

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A．a

B．the

C．不填

D．an

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I am in ______charge of the class which was in
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A．不填；the	B．不填；不填
C．the; 不填	D．the; the

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A．the; the

B．不填；a

C．the; a

D．不填；不填

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That Xiao Shenyang was elected_____model worker of May Day caused ____enthusiastic discussion in China.

A．the; the

B．a; an

C．the; a

D．a; the

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In America, _____ car is _____ popular means of transportation.

A．the; a

B．a; the

C．the; the

D．the; /

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