The scientists all agreed that rules of physics, ______ we are all familiar, govern the world.
| A．to which | B．on which | C．which | D．with which |
He dived in the water and _____ to search for his girlfriend’s lost gold ring.
| A．caught his breath | B．held his breath | C．lost his breath | D．took breath |
The light in his office is out. He_________ left for home.
| A．must have | B．must have been | C．should have | D．should have been |
If you are in a country ______they don’t speak your language，you can show the address to the taxi driver.
| A．which | B．where | C．what | D．when |
_________money has been invested to promote the traffic conditions of this city.
| A．A plenty of | B．A large amount of |
| C．A great number of | D．A large sum |
The teacher kept his _______ and took his students to the cinema，where they had _______.
| A．word；fun | B．words；fun | C．word；funs | D．words；funs |