He had to pause from time to time to wipe the sweat from his forehead，because the airconditioning system ______.
| A．broke in |
| B．broke up |
| C．broke out |
| D．broke down |
—Tom is so joyful that he smiles at everyone.
—So ________ you if you get the first in the exam.
| A．do | B．are |
| C．would | D．will |
I would have helped you，but I ________ the whole week.
| A．was really occupied |
| B．really occupied |
| C．have really occupied |
| D．will be really occupied |
I like these English songs and they ________ many times on the radio.
| A．taught | B．have taught |
| C．are taught | D．have been taught |
Now the world’s attention ________ the stock markets，as they have a great influence on the world’s economy.
| A．is fixing on | B．has fixed on |
| C．is being fixed on | D．had been fixed on |
Whatever you have found，you should give it back to whomever it ________.
| A．is belonged to | B．is belonging to |
| C．belonged to | D．belongs to |