注意：此页面搜索的是所有试题
题目内容
（国家开放大学管理英语）
— Can you go skating with us this afternoon?（考点：情态动词have to用法）
— Sorry, I can’t. I ________ take care of my little sister at home.
选择一项：
A.
could
B.
may
C.
have to
— Sorry, I can’t. I ________ take care of my little sister at home.
选择一项：
A.
could
B.
may
C.
have to
参考答案