The students found it easy to_______ what the experienced teacher had taught.
| A．take in | B．take off | C．take on | D．take back |
A reward of $1,000 will be given to can provide any clues to the case which has been investigated by the police for nearly half a year．
| A．whoever | B．whomever | C．anyone | D．who |
The best way to make a kid to be independent is to put him in a position _______ he has no one else to refer to ．
| A．that | B．what | C．where | D．which |
They are still very cautious about ________ side effect the new medicine will bring about, although the experts have tried it on about 2000 patients．
| A．which | B．that | C．where | D．what |
His opinion was such a good one _________ his family all agreed to accept．
| A．which | B．and | C．that | D．as |
_____ is known to us all that the 2012 Olympic Games will take place in London．
| A．It | B．Which | C．As | D．What |