(2013·甘肃河西五市一模)Look! The ground is wet. It must have rained last night, ________？
#64489
A
hasn't it
B
hadn't it
C
mustn't it
D
didn't it
推荐题目
－_______ do you go to the English club?－Once a week.
#59941
A
How old
B
How often
C
How much
D
How many
Fighting an artificial greenhouse effect seems to be the greatest of environmental challenges, ________？
#64479
A
isn't it
B
does it
C
doesn't it
D
is it