--- Could you tell me ?
---Yes, they to the library.
| A．where are the twins, have been |
| B．where were the twins, have been |
| C．where the twins are, have gone |
| D．where the twin were, have gone |
——would you like somewhere__________?
——No, thanks. I have a big room ________.
| A．live ,live | B．to live , to live |
| C．living, to live | D．to live , to live in |
What action should they _____________such a thing happen again?
| A．do stopping | B．do to stop | C．take stopping | D．take to stop |
You must stop and wait for your turn when you see the sign______.
A.
B.
C. 
Mr. Green ____ go to bed ____ he finished his work last night.
A. does; until B. don’t; until C. didn’t; until
when I heard the bad news I couldn’t help ________ .
A. laughing B. dancing C. crying