16. This contamination has threatened the park and many of the animals in it.
A. pollution B. dirt C. dust D. ugliness
Read the following paragraph then choose the best word to fill in each gap:
Nowadays people are more aware that wildlife all over the world is in ___(17)___. Many species of
animals are threatened and could easily become ___(18)___ if we do not make any effort to ___(19)___
them. In some case, animals are ___(20)___ for their fur, meat or other valuable parts of their bodies.
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