1.New kinds of intelligent robots have been developed ____
a.over the past few years b.a few years ago c.in a few years d.over few past years
选A
2.--The windows is dirty.
--I know.It ___for week.
a.hasn't cleaned b.didn't clean c.wasn't cleaned d.hasn't been cleaned
选D
3.I can't see any coffee in this cupbpard .____last night?
a.Has it all been finished b.Was it all finished c.Has it all finished d.Did it all finish
选B.(PS: 还有一道题跟这个完全一样,只是后面没了last night,选A,为什么啊?)
4.Computers can check exercises after they ____,and then move students gradually from easier exercises to more difficult ones according to their levels and abilities.
a.had been done b.has done c.have been done d.is being done
选C
5.The police found that the house ____,a lot of things____
a.has broken into;has been stolen b.had broken into;had been stolen
c.has been broken into;stolen d.had been broken