How the big forest fire has ________ remains to be a mystery.
| A．broken up | B．broken out | C．cut down | D．turned up |
It was in the lab ______ was taken charge of by Pro. Harris ______ they did the experiment.
| A．which; where | B．that; which | C．whom; that | D．which; that |
The public ______ of the environmental problem will make the government take it seriously.
| A．existence | B．revolution | C．awareness | D．evidence |
--Can you tell me ______ I can do with the broken computer?
-- Sorry, you’d better ask an expert ______ to deal with it.
| A．how ; what | B．what ; how | C．how ; how | D．what ; what |
The English are proud of the 30th Olympic Games _______ in London in 2012.
| A．to be held | B．to hold | C．holding | D．held |
The World Expo Shanghai 2010 is more like a platform for cultural exchange, ________ people into closer contact with the rest of the world.
| A．to bring | B．bringing | C．brought | D．having brought |