We will celebrate 
the 90th birthday of the Chinese Communist Party _____ July 1st, 2011.
| A．on | B．at | C．in | D．during |
–Whose is this purple scarf?
–It _______ be Mary’s. She always wears a purple scarf like this.
| A．must | B．can |
| C．mustn’t | D．can't |
Please _______ spend too much time playing computer games. It wastes a lot of time.
| A．not | B．aren’t |
| C．don’t | D．not to |
–Victor, could you please speak more _______ so that everyone can understand you?
–OK.
| A．heavily | B．widely | C．hardly | D．slowly |
It’s not easy to learn a foreign language, but I will never _______.
| A．put on | B．turn off |
| C．give up | D．try out |
My classmates and I are working much _______ than before, because we’ll take an important exam soon.
| A．hard | B．harder |
| C．hardest | D．the hardest |