问题描述：
联系句意,按首字母提示写词.（英语）
1.Water may be thr most serious problen in the world .Is this s___ you
2.The water c____ only from rivers,lakes and underground .And we can not even use all of that ,because iceberg t_____ some of it .Even w____,some of the water has been polluted.
注：给出单词,写出词义.
1.Water may be thr most serious problen in the world .Is this s___ you
2.The water c____ only from rivers,lakes and underground .And we can not even use all of that ,because iceberg t_____ some of it .Even w____,some of the water has been polluted.
注：给出单词,写出词义.
问题解答：
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