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THIS CONTAMINATION HAS THREATENED THE PARK AND MAN...
THIS CONTAMINATION HAS THREATENED THE PARK AND MANY OF THE ANIMALS...
BAI KIEM TRA 45 SO 3 HK2TINH QUANG NINH HS YEU
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21. This contamination has threatened the park and many of the animals in it.
A. dirt B. pollution C. dust D. ugliness
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21.
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BAI KIEM TRA 45 SO 3 HK2TINH QUANG NINH HS YEU