题目内容：

( )_four years since he graduated from college.A.there have been B.it has C.it is D.it was
The old man _ six years ago.
A.has died B.was dead C.has been dead D.died

优质解答

1 C（固定句型it's +一段时间+since 从句）
2 D ( six years ago 是一般过去时的标志,指死的动作）