A(Always) since the creation of celluloid, B(plastics) have been found C(to have

游客2025-05-07  1

问题 A(Always) since the creation of celluloid, B(plastics) have been found C(to have) D(a multitude) of industrial and commercial uses.

选项

答案 A

解析 always改为ever。ever since自从。
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