Salts can be prepared by______an acid with a base or a metal.A、mixB、mixingC、mi

游客2025-02-04 11

问题 Salts can be prepared by______an acid with a base or a metal.

选项 A、mix
B、mixing
C、mixed
D、to mix

答案 B

解析 The preposition by needs a gerund as its object: mixing.

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Saltscanbepreparedby______anacidwithabaseorametal.A、mixB、mixingC、mi