The students get on the bus ______ .
| A．one in one | B．one to one | C．one after one | D．one by one |
—May I come in? I’m sorry I’m late.
— Come in, please. But could you please tell me _______________?
| A．why you are late again | B．what were you doing then |
| C．who you talked with | D．how do you come to school |
—_________ nice trip to travel by air!
—__________.
| A．How a; So it is. | B．What a; So it is. |
| C．How ; So is it. | D．What ; So is it. |
______ twenty minutes enough for you to get to the station?
| A．Are | B．Do |
| C．Is | D．Does |
In the past few years there ________ great changes in my hometown.
| A．has been | B．have been |
| C．have had | D．were |
To make our city more beautiful, rubbish _________ into the river.
| A．needn’t be thrown | B．can’t thrown |
| C．mustn’t be thrown | D．may not thrown |