问题补充：
The medicine natural plants.
A. is made of
B. is made from
C. is made in
D. is made into
答案：
A. is made of
(答案→)B. is made from
C. is made in
D. is made into
解析：制成成品看不出原材料应该用be made from。
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时间：2019-05-26 06:20:34
The medicine natural plants.
A. is made of
B. is made from
C. is made in
D. is made into
A. is made of
(答案→)B. is made from
C. is made in
D. is made into
解析：制成成品看不出原材料应该用be made from。
