He must be helping the old man to water the flowers, ()?

分类: 综合英语(二)(00795) 发布时间: 2024-07-28 19:58 浏览量: 0
He must be helping the old man to water the flowers, ()?
A、is he
B、isn't he
C、mustn't he
D、must he
【正确答案】:B