6.He can't be waiting for us.
7.I was looking at the sky and I saw a strange star.8.8.I have't seen her since two month ago.
9.She has been to Beijing several times.
10.Jame was doing some cleaning at this time yesterday.
B
1.It it doesn't rain,we will go to visit the zoo.
2.The new secretary is supposed to report to the manager as soon as she arrives.
3.When I was at college,I spoke three foreign languages.but I have forgotten all except a few words of each.
4.The police found that the house had been broken into and a lot of things (had been) stolen.
5.The volleyball match will be put off it it rains.
6.Mary was making a dress when she cut her finger.
7.This is the first time that I have been here.
That was the first time that I had been here.
8.You can join the club when you get a bit older.
9.Mother promised she would buy me a bike.
10.We could have walked to the station.It was so close.
--Yes.A taxi wasn't necessary at all!