.They are forbidden ________,for they are still middle school students.
| A．to smoking | B．to smoke |
| C．smoked | D．smoke |
Three fourths of the homework _______ today.
| A．has finished | B．has been finished | C．have finished | D．have been finished |
—I’m sorry, but there’s no smoking in this section on the train.
—Oh, I ______ that, and I won’t again.
| A．don’t know | B．didn’t know | C．won’t know | D．haven’t known |
-- Glad to have talked with you!
-- _______________.
A It is my pleasure B With pleasure C Never mind D Don’t mention that
Out ______________, with a toy in his hand.
A did Tom rush B rushed Tom C Tom rushed D Tom did rush
There _____ be a shortage of water in Yunnan? I wonder. You know it is in the southwest of China where there used to be adequate rain .
A could B must C can D should