— ______ does Tom surf the Internet ? —Twice a week .      
#70510
A
How much
B
How many
C
How long
D
How often
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Tom used to be late, __?
#69277
A
didn’t he
B
isn’t he
C
did he
D
use not be
Tom’s never been late for school before, _______ ?
#69878
A
is he
B
isn’t he
C
has he
D
hasn’t he
Zhu Zhiwen’s never been to Hongkong, _______?
#71065
A
is he
B
isn't he
C
has he
D
hasn't he