The postman comes at 6:30 in the morning, ____ time I am usually fast asleep.
| A．when | B．at which | C．which | D．that |
----Why don’t you ______ to a more sensible method?
----Well, I’m thinking about it.
| A．switch on | B．switch off |
| C．switch over | D．switch through |
—May I watch TV for another 15 minutes, Mum?
—Oh, dear, if you _____.
| A．can | B．must | C．may | D．should |
The entire hall burst into a great cheer and applause _______ the Nobel Prize winner appeared on the stage accompanied by the chairman.
| A．until | B．while | C．by the time | D．the moment |
John has determined to _______ teaching in the quake-hit area when he graduates from university.
| A．pick up | B．set up | C．take up | D．give up |
------You’ve left the light on.
------Oh, so I have. _____________to turn it off.
| A．I’ll go | B．I’ve gone | C．I go | D．I’m going |