893.Excuse me.I ____I was blocking your way.

A.don't realize

B.don't realize

C.haven't realized

D.wasn't realizing

894.The palace caught fire three times in the last century, and little of the original building ______ now.

A.remains

B.is remained

C.is remaining

D.has been remained

893.答案是A；

结合语境，后文暗示过去时，指刚才没有意识到。

894.答案是A；

remain vi.剩下，留下，不可使用被动语态。