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3.The people were given help by the Red Cross. Their homes had been damaged by the flood. 4.The humans are destroying nature day by day. It of course,will cause severe punishment sooner or later. 5.The man was under the tree. The man is her father.

答案:The people,whose homes had been damaged by the flood,were given help by the Red Cross.

答案:The humans are destroying nature day by day,which of course,will cause severe punishment sooner or later.

答案:The man who was under the tree is her father.