He found it increasingly difficult to read, ______ his eyesight was beginning to

游客2024-01-18  6

问题 He found it increasingly difficult to read, ______ his eyesight was beginning to fail.

选项 A、and
B、for
C、but
D、or

答案 B

解析 for是并列连词,引导并列分句,意为“因为”,表示附加的理由,是推测或判断的理由。and表示两句之间是并列关系。but意为“但,但是,可是,然而”,表示两个句子是转折关系。or表示两句之间是选择关系。
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