I know _________ I promised to take you to dinner, but I won't finish working until ten o’clock.
| A．that | B．if | C．what | D．why |
—May I take some pictures here？
—Sorry，you mustn’t．Please look at the sign．It says“________”．
A．NO PHOTOS
B．NO TALKING
C．DANGER
Hurry up，or you ________ catch the train．
| A．can’t |
| B．needn’t |
| C．mustn’t |
| D．shouldn’t |
—Must I hand it in today？
—No，you ________．You can do it tomorrow．
A．mustn’t
B．can’t
C．needn’t
Don’t drink the soup．It smells ________．
| A．nice |
| B．delicious |
| C．salty |
| D．terrible |
—What are the school rules？
—We ________ arrive late for class．
| A．aren’t |
| B．don’t |
| C．can’t |
| D．don’t have to |