The clock has just _________ twelve. All the teachers should stop _________ and let the students have a rest.
| A．hit; to teach | B．beaten; teaching | C．struck; teaching | D．knocked; to teach |
—Would you like to tell me what our teacher said just now?
—She said that light__________faster than sound.
| A．travels |
| B．traveled |
| C．would travel |
| D．was traveling |
—Did you telephone the manager’s office?
—Yes，he__________back before 9 o’clock this morning.
| A．expects | B．is expected | C．expected | D．was expected |
You can certainly leave the classroom as soon as your homework__________.
| A．has done |
| B．has been done |
| C．will be done |
| D．will have been done |
—Do you smoke?
—No，I don’t.It’s two years since I __________.
| A．smoked |
| B．have smoked |
| C．has smoked |
| D．don’t smoke |
—How is the boy?
—Sorry.He__________though the doctor made every effort to save him.
| A．died | B．was dead | C．had died | D．has been dead |