问题补充：
People often use plastics to wood or metal.
A. in place of
B. take their place
C. take the place of
D. instead of
答案：
A. in place of
B. take their place
(答案→)C. take the place of
D. instead of
解析：短语辨析。A. 代替 B. 就做 C.代替 D. 代替。句意：人们经常用塑料代替木头和金属。To是不定式符号，后面只能接动词，故选C。
