______you have finished the course, you can start doing more revision work.

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问题 ______you have finished the course, you can start doing more revision work.

选项 A、Up to now
B、Now that
C、By now
D、Ever since

答案B

解析本题考查状语从句的连接词。Now that是连词，表示“既然，由于”。Up to now是介词短语，表示“到目前为止”。By now是介词短语，表示“截至现在”。Ever since表示“自从那时以来”。

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