问题
选择题
Just as the experts _____ it, this kind of material is not natural, but man-made. [ ]
A. get
B. put
C. make
D. mean
答案
答案：B
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Just as the experts _____ it, this kind of material is not natural, but man-made. [ ]
A. get
B. put
C. make
D. mean
答案：B