— ______ 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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--There is no juice in the fridge, _____? --No, we’d better go and buy some.
#69666
A
is there
B
isn’t there
C
is it
D
isn’t it
He’s gone to the library ,_______ he ?
#68962
A
isn’t
B
doesn’t
C
hasn’t
D
wasn’t
 He found nothing in the mom,        ?
#71194
A
doesn’t he
B
does he
C
didn’t he
D
did he