--- You may refuse my invitation , but you must explain why .  --- Oh, I must , _____ ?
#65028
A
did I
B
didn’t I
C
must I
D
mustn’t I
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---Is she your mum, Helen?---________________.
#60139
A
Yes, it is.
B
Yes, she is.
C
Yes, he is.
D
No, she is.
I don’t think she will come to the meeting on time, ______?
#64672
A
do I
B
do you
C
will she
D
won’t she
—Is this your eraser?    —______.   
#59763
A
Yes,it isn’t
B
No,this isn’t
C
No,it isn’t
D
Yes,this is
 ---         students are there in your class?--- Thirty-five.
#60021
A
How old
B
How much
C
How many
D
How often