Charles is believed_______ the floor yesterday; he is always helping others silently.
| A．to sweep | B．to have swept |
| C．having swept | D．Swept |
32. —How do you find my idea?
—_______.
| A．By opening your notebook. | B．I don’t like it a bit. |
| C．You showed it to me. | D．When I came in, I found it. |
31. Don’t you think that______________ is no use promising without doing?
| A．this | B．that | C．it | D．What |
30. Is this the girl______ whom I can turn for help? Is she good at this subject?
| A．to | B．with | C．in | D．At |
28._______ our food running out, we had to walk to a village for help.
| A．Since | B．Because | C．With | D．For |
28. It was __________________ back home from work.
| 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 |