One of our rules is that every student wear the school uniform while at school.
| A．might | B．could | C．shall | D．will |
He had to pause from time to time to wipe the sweat from his forehead, because the air-conditioning system.
| A． | broke in | B． | broke up | C． | broke out | D． | broke down |
Hot _______the night air was, we slept deeply because we were so tired after the long journey.
| A．although | B．as | C．while | D．however |
If my car _________more reliable, I would have driven to Lhasa instead of flying last summer.
| A．was | B．had been | C．should be | D．would be |
-I'm sorry for being late. I should have phoned you earlier.
--. I've just arrived.
| A． | That's no trouble | B． | You are welcome |
| C． | That's all right | D． | You can never tell |
________ in a long queue, we waited for the store to open to buy a New iPad .
| A．Standing | B．To stand | C． Stood | D．Stand |