________the working efficiency, the boss allows the employees to have a coffee break.
| A．Improving | B．To improve | C．Having improved | D．Improved |
Everybody in our class admires Lily, for she has a __________ for playing the piano.
| A．present | B．gift | C．ability | D．power |
_________ you’ve got a good chance, you should make full use of it.
| A．Now that | B．After | C．Although | D．As soon as |
_________ is known to us all is that 2012 Olympic Games will take place in London.
| A．It | B．What | C．As | D．Which |
If weather ________, we’ll go cutting.
| A．allows | B．permits | C．lets | D．promises |
The place ____________ the bridge is supposed to be built should be _______ the cross –river traffic is the heaviest.
| A．which; where | B．at which; which | C．at which; where | D．which; in which |