bamboo _______ paper.l_____ use the paper made from it A.used to make,used to B.is used make

题目

bamboo _______ paper.l_____ use the paper made from it A.used to make,used to B.is used make
,am used to
C.is usede to make,used to
D.is used to making,am used to

答案

C
be used to do sth 被用来做……
used to do sth 过去常常做某事
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