题目内容
与很多受污染的城市相比,青岛的空气干净多了。(compared with) |
Compared with many polluted cities, the air in Qingdao is much cleaner. |

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The new safety problem of contaminated(受污染的)milk is much more widespread, at least 22 dairy companies and their milk products that have appeared nationwide.
A.to involve |
B.involved |
C.involving |
D.being involved |