I was about to go to bed ____ the telephone rang.
| A．while | B．as | C．at the time | D．when |
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 |
I've never seen a Shakespeare's play ______ so wonderfully.
| A．performing | B．performed | C．perform | D．is performing |