问题
选择题
It's known that the paper for books and magazines ________ from wood.[ ]
A．are made
B．is made
C．has been made
D．is being made
答案
答案：B
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It's known that the paper for books and magazines ________ from wood.[ ]
A．are made
B．is made
C．has been made
D．is being made
答案：B