用括號中的詞改寫以下句子

We must be at the theatre by 7`clock this evening.(have to)

I think she is about thirty years old.(must)

He must be at the airport before 10`clock.(has got to)

Must you tell everyone our secrets? (have to)

We must be at the theatre by 7`clock this evening.(have to)

We have to arrive at the theatre before 7"olock this evening.

I think she is about thirty years old.(must)

I think she must be thirty years old.

He must be at the airport before 10`clock.(has got to)

He has got to arrive at the airport before 10 " clock.

Must you tell everyone our secrets? (have to)

Do you have to tell everyone our secrets.