World Expo is regarded as the Olympic Games of the economy, science and technology, expert said.
| A．A; an | B．The; an | C．The; a | D．A; the |
—Excuse me. Is this the right way to the Summer Palace?
—Sorry, I am not sure, but it ____ be.
| A．must | B．can | C．might | D．will |
They looked at each other, ______.
| A．Astonishing | B．astonished | C．to astonish | D．astonishingly |
Mr. Smith, _______ of the ______ speech, started to read a novel.
| A．tired, boring | B．tiring, bored | C．tired, bored | D．tiring, boring |
Look, what a dirty classroom we have got! It really wants ______.
| A．clean | B．cleaned | C．cleaning | D．to clean |
It is high time, I think, that you got down to ______ something in class.
| A．do | B．did | C．doing | D．does |