---_____ times did you do sports last week?
--- Twice
| A． How often | B．How many | C．How long | D．How much |
—May I play computer games now，Mom？
—No．You ________ finish your homework first．
| A．must |
| B．can |
| C．could |
| D．may |
—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 |