— 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 |
My uncle is used to for the children in poor areas.
| A．raise money | B．raised money | C．raising money | D．raises money |
Our teacher told us in the class.
| A．don’t sleep | B．not to sleep | C．not sleep | D．not slept |
——Did you go to Jack’s birthday party?——No, I _________.
| A．am not invited | B．wasn’t invited | C．haven’t invited | D．didn’t invite |
——Must we finish the exercise today?——No, you________.
| A．mustn’t | B．don’t have | C．don’t have to | D．needn’t to |
Your pocket money can be used to _____ charity, you used to _______ a lot on snacks.
| A．supporting; spend | B．support; spending | C．support; spend | D．supporting; spending |