Look at the floor , Tom ! _____you watch TV while having a meal?
| A．Should | B．Could | C．Would | D．Must |
The past two years _______ a sharp rise in oil price，which adds to the burden of auto transportation industry.
| A．witnessed | B．witnesses | C．is witnessing | D．has witnessed |
Mr. Duncan raised an unnecessary question __________ he then failed to find an answer.
| A．to which | B．for which | C．with which | D．by which |
Ｉdon’t think Linda could have done such a stupid thing last night，_________?
| A．do I | B．didn’t she | C． did she | D．don’t I |
My uncle hasn’t been able to quit smoking, but at least he has_________.
| A．cut out | B．cut down | C．cut up | D．cut off |
Bob tried to sweet-talk his mother into letting him go out. But when he saw his sweet talk________， he lost his temper.
| A．hadn’t worked | B．wasn’t working | C．isn’t working | D．doesn’t work |