30.It was_________ back home after the experiment.
| A．not until midnight did he go | B．until midnight that he didn’t go |
| C．not until midnight that he went | D．until midnight when he didn’t go |
The old man walks_____ dog after _____ supper every day.
| A．the ; / | B．/；/ |
| C．the ;the | D．a ;the |
My suggestion is that he _________to see a doctor at once.
| A．goes | B．go | C．will | D．is going |
Helen had to shout ________above the sound of the music.
| A．making herself hear |
| B．to make herself hear |
| C．making herself heard |
| D．to make herself heard |
I don’t know ______ tomorrow. Can you tell me?
| A．when we started | B．when did we start |
| C．when we will start | D．when will we start |
A large number of students in our school ____ from the countryside; the number _____ growing these years.
| A．is; has been |
| B．are; has been |
| C．is; have been |
| D．are; have been |