While building a tunnel through the mountains, ______.
| A．an underground lake was discovered | B．there was an underground lake discovered |
| C．a lake was discovered underground | D．the workers discovered an underground lake |
Many businesses must have been badly influenced during that financial crisis, ________?
| A．haven’t they | B．didn’t they | C．must’t they | D．weren’t they |
Your attention, please! ________ today is Professor Yu Dan from Beijing Normal University.
| A．Have joined us | B．To join us | C．Joining us | D．Join us |
---You see, I’m poor in Chinese, you are not good at English, and...
--- That’s ____ we should help each other.
| A．when | B．where | C．how | D．what |
---Look! The two boys always come in and go out in pairs.
---That’s really as a saying goes, “_______.”
| A．Two heads are better than one |
| B．Birds of a feather flock together |
| C．Bad fortunes never come singly. |
| D．One boy a boy, two boys half boy, three boys no boy |
---____ is our new headmaster?
---The man standing by the window, smoking a cigarette.
| A．Where | B．How | C．Which | D．What |