问题补充:
He must be helping the old man to water the flowers,?
A. is he
B. isn he
C. must be
D. mustn he
答案:
A. is he
(答案→)B. isn he
C. must be
D. mustn he
解析:must在此表猜测,是“一定”之意,此时反意疑问句部分以must之后的动词为准,所以B项正确。
时间:2023-11-14 09:54:15
He must be helping the old man to water the flowers,?
A. is he
B. isn he
C. must be
D. mustn he
A. is he
(答案→)B. isn he
C. must be
D. mustn he
解析:must在此表猜测,是“一定”之意,此时反意疑问句部分以must之后的动词为准,所以B项正确。