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
点击查看答案&解析
相关考题
-
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 -
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 -
单项选择题
Not until most of the people had left the airport（）his sister was there.
A.that he saw
B.had he seen
C.did he see
D.that he had seen
