Where to hold the 2012 Olympic Games was a subject ______ the Olympic Committee argued for a long time, and finally they voted for London.
| A．of which | B．with which | C．about which | D．into which |
When lastvaluable, those books enjoyed great success.
| A．finding | B．found | C．being found | D．to be found |
He knows little of mathematics, of chemistry.
| A．and still less | B．as well as | C．and still more | D．no less than |
Discovering consists of seeing what everybody has seen andwhat nobody has thought.
| A．think | B．thinking | C．thought | D．to think |
—Did the policeman let you in?—No, I told him who I was.
| A．if | B．once | C．as though | D．even though |
He likesmusic so much that I think it right to buy himMP3 asbirthday present.
| A．the; an; a | B．不填；an; the | C．不填；an；a | D．the；a; a |