—We need a new leader for our Helping Hands Club,but I don’t know_______.—Why not Mary? She is always willing to help others.
#70807
A
what to choose
B
how to choose
C
when to choose
D
who to choose
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His father seldom goes shopping, _______? 
#70701
A
is he
B
doesn’t he
C
does he
D
isn’t he
Mrs. Wong hardly has spare time to look after her daughter, __________?
#70372
A
has she
B
does she
C
hasn’t she
D
doesn’t she
English is very useful ,____it?
#68527
A
doesn’t
B
isn’t
C
can’t
D
won’t