问题
选择题
They tried to ____ hard plastics for metals in manufacturing machine parts. [ ]
A. replace
B. substitute
C. take the place of
D. give way to
答案
答案：B
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They tried to ____ hard plastics for metals in manufacturing machine parts. [ ]
A. replace
B. substitute
C. take the place of
D. give way to
答案：B
sin
V