21. Move a few steps, and the oil-paintings look better .A. in the distance B. at onceC. i

21. Move a few steps, and the oil-paintings look better .
A. in the distance
B. at once
C. in the open air
D. at a distance

A. in the distance B. at onceC. in the open airD. at a distance解析：可联系答.案.网客服索取。

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