罗马是建在七山之上的城市，拥有大小500座教堂，我几乎都去过了。
A. Rome was located on seven hills with 500 churches,big and small,and I visited nearly all of them.
B.Rome was built on seven hills,and it owed 500 big and small churches, I visited nearly every one.
C. Rome is a city which was built on seyen hills and owed 500 big and small churches,and I have visited nearly all of them.
D.Rome was located on seven hills with 500 big or small churches. I have visited nearly every one.