________that the government can clear up official corruption，we are________ about the future of our country.
| A．Convinced；optimistic | B．Convincing；optimistic |
| C．Convinced；pessimistic | D．Convincing；pessimistic |
In the reading room, we found her____ at a desk, with her attention____ on a book.
| A．sitting; fixing | B．to sit; fixed | C．seating; fixing | D．seated; fixed |
______ , the players began the game.
| A．Having taken our seats | B．Taking our seats |
| C．Being taken the seats | D．After we had taken our seats |
— I phoned you yesterday morning. A girl answered, but I didn’t recognize the voice.
— Oh, it ____ my younger sister. She was in my room at that moment.
| A．must have been | B．should have been | C．could have been | D．may have been |
The old woman who______in the deserted house alone for ten years has been settled in a nursing home now.
| A．lived | B．has lived | C．had lived | D．has been living |
The new buyer identified a dozen new sources for the material, ___________ proved to be reliable．
| A．most of them | B．most of which | C．most of whom | D．most of those |