Mary always finishes her homework ________ she goes to bed.

[　　]

We ________ laugh at our classmates.

[　　]

You ________ look at the traffic lights before you cross the street.

[　　]

________ policeman told Sam not to play ________ football in ________ street.

[　　]

Some of the children are visiting the country，________ are helping the farmers.

[　　]

[　　]

A．in　　　B．at　　　C．of　　　D．to

----______ would you like, oranges or bananas?

----Oranges, please. 

[    ]

　　A. What    B. Why    C. Which    　　D. How

You ______ get up so early. It's Sunday.

[    ]

　　A. can't   B. mustn't   C. needn't   D. shan't

Do you mind ______ the window?

[    ]

　　A. to open   B. open   C. opening   D. if open

I haven't been to the park and he hasn't, ______.

[    ]

　　A. either   B. too   C. also   D. neither