As time went by, the plan stuck ____ fairly practical.
| A．to proved | B．to proving | C．proved | D．to be proved |
_____ 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 |
—Would you give it another guess?
—____ —tell me the answer．
| A．Let me think | B．You never know |
| C．Never mind | D．I give up |
Beijing Times reported the regulation, _____, would take effect on Jan．1, 2012．
| A．if passing | B．if passed |
| C．if it passed | D．if it being passed |
Shops have shown little enthusiasm about Father’s Day, _____ the active promotion campaigns on Mother’s Day．
| A．compare with | B．compared with |
| C．to compare with | D．having compared with |