题干
—Must I clean the room now?
—No, you . You can do it later.
A：needn't
B：can't
C：may not
答案(点此获取答案解析）
A
—Must I clean the room now?
—No, you . You can do it later.
A：needn't
B：can't
C：may not
，它在一定条件下可能发生的反应是( )