高等教育 / 英语（一）
(单选题) When we called at the market, we felt amazed at the use _ _ _ _ _ _ _ _ the waste plastic bags.( )
A、they had made
B、they had made of
C、they had put
D、they had put to
A、they had made
B、they had made of
C、they had put
D、they had put to
参考答案：
佳题速递：