9. _______you _______ stay at home today?A. Do ; have to B. Must; have to C. Have; to D

题目

9. _______you _______ stay at home today?

A. Do ; have to

B. Must; have to

C. Have; to

D. Do ; must

参考答案和解析
正确答案:A
9.A【解析】have to的疑问形式借助动词do来实现, must的疑问形式是将must提到主语之前,另外还需注意have to与must不能重复使用。故答案为A。