译林牛津版必修3Unit 3 Back to the past Grammar and usage(共10张PPT)
译林牛津版必修3Unit 3 Back to the past Grammar and usage(共10张PPT)第5页

(1) Either … or…

can be used to express the idea of alternatives. eg: You can choose either A or B, which means you have two choices, i. e, you can choose any one of the two.

Usage

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