It's a long way,so ____ is necessary ____ you to take enough water.A.it,ofB.this,forC.that,ofD.it for
问题描述：
It's a long way,so ____ is necessary ____ you to take enough water.
A.it,ofB.this,forC.that,ofD.it for
答
D
it's +adj. + for sb to do sth 固定句型
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