By six'o clock in the afternoon,the manager finished all his work哪里错?
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Bysix''oclockintheafternoon,themanagerfinishedallhiswork哪里错?Bysix''oclockintheafternoon,themanagerfini
By six'o clock in the afternoon,the manager finished all his work哪里错?
By six'o clock in the afternoon,the manager finished all his work哪里错?
By six'o clock in the afternoon,the manager finished all his work哪里错?
By six'o clock in the afternoon,the manager had finished all his work
第一种，by---at
第二种，finished---has finished
finished 前加has