— It’s dangerous to swim in this river.
— Yes, you are right. The government has_______ people not to swim in it.
| A．trained | B．warned |
| C．led | D．encouraged |
“Can you sing the song in English?” “No , I _________”
| A．may not | B．mustn’t | C．needn’t | D．can’t |
“Whose bike is it ?” “It’s ____________”
| A．John | B．John’s | C．Johns’ | D．Johns |
Bruce, look at your dirty shoes. You’d better ________them right now.
| A．washed | B．washing | C．wash | D．to wash |
I met Kate on ___________way home yesterday.
| A．my | B．me | C．his | D．him |
It’s hot ____________summer in Beijing.
| A．by | B．on | C．at | D．in |