He must be helping the old man to water the flowers,______ ?      
#65512
A
is he
B
isn’t he
C
must he
D
mustn’t he
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She must be at the railway station at 9 o’clock,________?
#65445
A
mustn’t she
B
must she
C
ought she?
D
need she
--      are the Olympic Games held? --Every four years.
#60254
A
How often
B
How soon
C
How long
D
When
The news that he fought with his coach surprised us, ________?
#64675
A
did he
B
didn’t it
C
didn’t he
D
did it