题目内容
He must be helping the old man to water the flowers, ________?
[ ]
A.
is he
B.
isn’t he
C.
must he
D.
mustn’t he
答案:B
练习册系列答案
相关题目
题目内容
He must be helping the old man to water the flowers, ________?
is he
isn’t he
must he
mustn’t he