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【单选题】What is the meaning of “serve its purpose” and “every step of the way” in the sentence “From animal skin to linen, from cambric (麻布) to silk and cotton and to the various kinds of materials today, inn...
A.
play its role / throughout the process
B.
provide people with something they need / with all the sequences of foot movements
C.
provide service / in somebody’s way
D.
perform a particular function / along the flat surfaces in one's way