—Will people live to be 300 years old?—_________. 
#59753
A
No, they aren’t
B
No, they won’t
C
Yes, they were
D
Yes, they do
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We don’t believe the baby is badly ill,__________?
#64523
A
do we
B
is he
C
is it
D
isn’t it
——Would you mind if I keep the door open? ——____________.
#64969
A
Yes, do it  
B
No, of course not
C
Yes, go ahead
D
No, you can’t open it
—— ___________ do you have this kind of match? —— Once a year.
#60085
A
How long
B
How often
C
How many
D
How much