问题

Doyoubelievethatpaperismade_______wood—Yes,Ido.Andyoucanseethatbooksaremade________paper.
A:;from;from;
B:;from;of
C:;of;from;
D:;of;of;
B:;from;of
C:;of;from;
D:;of;of;
正确答案是: