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My grandfather doesn't know               to use a computer.
#59736
A
what
B
who
C
how
D
which
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       my baseball?It’s under the chair.
#60024
A
Where’s
B
Where
C
Where’re
D
Where be
—Is this your eraser?    —______.   
#59763
A
Yes,it isn’t
B
No,this isn’t
C
No,it isn’t
D
Yes,this is
“I think the teacher is wrong, _____?”“No, I don't think so.”
#65497
A
don't you
B
don't I
C
doesn't he
D
doesn't she
    yogurt do you need?
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A
How long
B
How many
C
How much
D
How old
I think they failed to accomplish the task, ______?
#65406
A
do I
B
don't I
C
did they
D
didn't they