_____ we have finished the course, we shall start doing more revision work.

_____ we have finished the course, we shall start doing more revision work.

A.For

B.Ever since

C.Now that

D.By now

答案及解析： C

解析：

本题考查状语从句的连接词，根据意思是指：既然我们学完了课程，我们将开始做复习。所以选择C。也可以用 since。