A ir pollution is more serious than water pollution.英译汉
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M ark couldn ’ t come to the party because he had to work.英译汉
I’ ve just come back from Britain.英译汉
鸽蛋呈椭圆形，蛋壳()，可作为装饰用。
A. 白色
B. 红色
C. 棕红色
D. 棕褐色
I met one of my old friends on my way home yesterday evening.英译汉
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