At our school,you must_______________.
You mustn't_________________.
You don't have to____________.
must mustn't 填空并补全对话.
My parents told me____________________because I have a big test tomorrow.
Sally talked to her English teacher,and he told her________________because she makes too many mistakes.
Robert talked to his girlfriend and she told him_____________because he works too much.
Grandpa talked to his doctor and she told him_____________
because he's a little too heavy.
We talked to our landlord and he told us_______________because the neighbors are upset.
I talked to my grandmother and she told me_____________________because life is short.