问题
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
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
In China, children（）school at seven.
A.has to start
B.must to start
C.have to start
D.can start
参考答案：C