问题描述：
It is very___to swim in that river.（danger) The girl is ___when she crosses the road.(care)
The plane landed __at last .(safe) We know every year the vets in the __take care of a lot of animals.(clinic)
The plane landed __at last .(safe) We know every year the vets in the __take care of a lot of animals.(clinic)
问题解答：
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