Before you think about asking for a promotion, make sure that either a position

游客2023-09-19 10

问题 Before you think about asking for a promotion, make sure that either a position opening exists ______a new position is needed to be created.

选项 A、and
B、nor
C、or
D、but

答案 C

解析 either…or…为固定搭配，表示“或者…或者”。前面出现了either，故选C。

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