题目内容
The environment here has been greatly improved in recent years. trees are thick and
green,birds remain all the year long.
A.Even if B.Although C.Unless D.Where
D
解析:
本句考察复合句。句意为:近几年这里的环境有很大的改善,树又密又绿,鸟儿一年四季都在这里。用where作为引导词,整个从句来说明这里的环境的确是改善了。
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