The practice of hanging clothes across the street is a common_____in many parts of the city.
| A． | look | B． | sign |
| C． | sight | D． | appearance |
“The day is coming _____telegraph wires will be _____on to houses just like water or gas.” He said in his letter to his father.
| A．that; lay | B．that; laid | C．when; laying | D．when; laid |
_______ 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 |