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We can never expect bluer sky unless we create less polluted world. A. a; a B. a

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We can never expect bluer sky unless we create less polluted world. A. a; a B. a

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

A. a; a                   B. a; the                C. the; a                D. the; the

试题答案

A

标签：expectbluerskywecan

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