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They want to develop a kind of dog-friendly food _________ will help dog owners cool down  their pets.
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A
who
B
what
C
which
D
whether
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The man        is talking to our teacher is Betty’s father.　　
#42758
A
which
B
whom
C
who
D
what
—Do you know the person with __________ he always chatted online?—Yes, one of his QQ friends.
#42573
A
which.
B
what.
C
that.
D
whom.
Last month I went to a small village     I was born.
#43007
A
when
B
what
C
how
D
where
—I hear you have moved into your new house .Congratulations ! -—Thanks. I especially like my study _______ is big and bright.
#43095
A
which
B
who
C
what
D
why
The man to ______ my father is speaking is my uncle.
#42695
A
him
B
that
C
who
D
whom