He doesn’t do his homework______ , though he has ____.
| A．careful enough; time enough | B．carefully enough; enough time |
| C．enough careful; enough time | D．enough carefully ;time enough |
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 |
_______ on your study, and you will make greater progress．
| A．Concentrating | B．If you concentrate |
| C．Concentrate | D．To concentrate |