题目内容
We don't know ________ with the rubbish and it pollutes our land and sea.
[ ]
A.how do it
B.how to do
C.what do it
D.what to do
答案:D
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题目内容
We don't know ________ with the rubbish and it pollutes our land and sea.
A.how do it
B.how to do
C.what do it
D.what to do