We will lose the game unless he ______ us.
| A．helps | B．helped | C．was helping | D．has helped |
_______ she finds out that you’ve lost her book?
| A．What about | B．How about | C．How if | D．What if |
It is ______ great pleasure to meet the expert who is doing research on _________ archaeology.
| A．/ ; | B．/; the | C．a; the | D．a; / |
People who cannot _____ between colours are said to be colour-blind.
| A．distinguish | B．compare | C．contrast | D．distribute |
When we went past her house, we heard her ____ in her room.
| A．dance | B．dancing | C．sing | D．singing |
To get there in time, they came ______ all the way.
| A．to run | B．running | C．ran | D．run |