问题
选择题
The machines which ______ in this exhibition are used ______ producing different kinds of paper.[ ]
A. are shown; to
B. shown; to
C. shown; for
D. are shown; for
答案
答案：D
搜题请搜索小程序“爱下问搜题”
The machines which ______ in this exhibition are used ______ producing different kinds of paper.[ ]
A. are shown; to
B. shown; to
C. shown; for
D. are shown; for
答案：D