7. This is the first time I had been here.

6. Mary is making a dress when she cut her finger.

5. The volleyball match will be put off if it rain.

4. The police found that the house has been broken into and a lot of things stolen.

3. When I was at college I spoken three foreign languages, but I had forgotten all except a few words of each.

2. The new secretary will supposed to report to the manager as soon as she arrives.

1. If it won't rain, we will go to visit the zoo.

10. Jane is doing some cleaning this time yesterday.

B級(jí)　 單項(xiàng)單句改錯(cuò)

9. She has gone to Beijing several times.

8. I haven't seen her since two months.