问题

Jack must be helping his grandma to water the flowers,______?
A:is he
B:isn’t he
C:must he
D:mustn’t he
B:isn’t he
C:must he
D:mustn’t he
正确答案是:
同类题型
Whose notebook is this? Is it ______?—No, ______is blue and yellow,
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Dear students, please read every sentence carefully. ______you are, ______mistakes you’ll make.