问题
选择题
It is third time that he______ his homework since he______ to this school
A doesn’t finish; comes B hadn’t finished; came
C. hasn’t finished; came D didn’t finish; came
答案
C
考查句型：It is third time that后用现在完成时态，句意：自从他来到这所学校以来，这是他第三次没完成作业了。动作是从过去持续到现在，故选C。