求全解①（D）—Jack!My new pipe ,you did it?

求全解①（D）—Jack!My new pipe ,you did it?
—Oh,no!I just had a look,Grandpa.
A.was broke B.had been broken C.has broken D.is broken【为嘛不选A啊】
②（B） I’ve finally finished my paper and it ＿＿ me an entire month.
A.takes B.took C.was taken D.had taken【为嘛不选B】
③（A）He _ articles for our wall-newspaper these three years,and he _ about forty articles
A.has been writing; has written B.has been writing; wrote C.is writing; has been writing D.has written; has written【为嘛不选B】
④（A）
---You’ve left the light on.
---Oh,so I have.________ and turn it off.
A.I’ll go B.I’ve gone C.I am to go D.I’m going
【为嘛不是D】