---We can’t expect _____blue sky unless we create ____less polluted world.
A．a(chǎn); aB．a(chǎn); theC．the; aD．the; the
A

試題分析：考查冠詞。Sky本來(lái)是不可數(shù)名詞，但前面有形容詞修飾的時(shí)候，可以使用a/an修飾。第二空用a表示泛指一個(gè)污染不太嚴(yán)重的世界。句意：如果我們不創(chuàng)造出一個(gè)污染不太嚴(yán)重的世界，我們就不能期待有一個(gè)湛藍(lán)的太空。故A正確。
點(diǎn)評(píng)：冠詞的考查集中在the表示特指；a/an表示泛指。另外還要注意一些冠詞的固定詞組。
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