问题描述：
将下列句子合并成定语从句
The man must be from Africa.It can be seen from his skin Mike refused to go to the party.The reason was that he hadn't been invited The villagers depends on the river for their drinking water.It has been seriously polluted
The man must be from Africa.It can be seen from his skin Mike refused to go to the party.The reason was that he hadn't been invited The villagers depends on the river for their drinking water.It has been seriously polluted
问题解答：
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