They must have finished the work by the end of last month, ______? 
#64447
A
hadn’t they
B
mustn’t they
C
haven’t they
D
didn’t they
推荐题目
---_______ are these apples ? ---Ten yuan . 
#60291
A
What number
B
How much
C
How many
D
What color
—Jack, you water the flower today, ___?— But, dad, I watered it yesterday.
#64804
A
do you
B
will you
C
didn’t you
D
don’t you