While as workers or objects of affection, dogs have certainly proven themselves

游客2025-01-20 33

问题 While as workers or objects of affection, dogs have certainly proven themselves to be beneficial to humans in many ways.

选项 A、But
B、Whether
C、Lest
D、Though

答案 B

解析本题重点考查常见并列连词词组。英语中有一些常见的表示在两者之间选择的并列连词，如whether…or…，either…or…，neither…nor…。四个选项中，能与or一起构成并列连词词组的，只有B。whether．．．or．．．是一个固定的并列连词，意为“不管……还是……”。

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Whileasworkersorobjectsofaffection,dogshavecertainlyproventhemselves