3 （ ）It is two days since I____the book.A.has had B.has bought C.bought D.buy
问题描述：
3 （ ）It is two days since I____the book.A.has had B.has bought C.bought D.buy
答
C
since 什么事件、什么动作发生（肯定是过去发生的）,因此跟过去时哦,选bought
前面可以是完成时,这里强调的是到现在是几天（现在时也可以）,也就是说 It is two days = It has been two days since I bought the book