He must be helping the old man to water the flowers，________？
#64494
A
is he
B
isn't he
C
must be
D
mustn't he
推荐题目
—Alice, you feed the bird today；______ ？ —But I fed it yesterday.
#65414
A
do you
B
will you
C
didn’t you
D
don’t you
--_______students are there in your class,Mr Li? --Fifty.
#60148
A
How old
B
How much
C
How many
D
what
—— ______ TV do you watch every day?——About two hours.
#60037
A
How much
B
How many
C
How long
D
How often