1.Better late than never,___?
A.isn't it B.hadn't it C.hadn't you D.wouldn't you
2.The task we had just completed proved to be more difficult than___
A.expected B.had expected C.I expected D.I've expected
3.the door open and ___the teacher.
A.comes in B in comes C.came in D.in came
4.the house ___we visited last month is the one ___LuXun once worked
A.which..which B.that..which C.where..where D.\..where