单项选择题
A.to meet you B.having met you C.be meeting you D.to have met you
In China, children（）school at seven.A.has to startB.mus...
单项选择题In China, children（）school at seven.
A.has to start B.must to start C.have to start D.can start
I（）finish my homework now. I can do it at the weekend.A...
单项选择题I（）finish my homework now. I can do it at the weekend.
A.have to B.don‘t have to C.must D.mustn‘t
People wandering in the fairground or park area（）wear a...
单项选择题People wandering in the fairground or park area（）wear a uniform.
A.must B.mustn‘t C.have to D.don‘t have to
