The teacher came to the classroom and demanded ___ what had happened.
| A．his students to tell him | B．being told |
| C．telling him | D．to be told |
Don’t handle the vase as if it ____ made of steel．
| A．were | B．is |
| C．has been | D．had been |
To keep fit, the old man makes it a rule _____ for a walk after supper every day．
| A．going | B．to go | C．go | D．gone |
--I'm sorry I made a mistake！
--__________Nobody is perfect．
| A．Take your time | B．You're right |
| C．Whatever you say | D．Take it easy |
One can always manage to do more things, no matter______ full one’s schedule is in life．
| A．how | B．what | C．when | D．where |
The police were seeking more information to find out________ killed the rich merchant．
| A．who it was that | B．who was it that |
| C．it was who | D．who was it |