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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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Is this museum ___________ he wishes to visit?
#43080
A
the one
B
which
C
to which
D
to that
All the children like the teachers ________ can understand them.
#42986
A
who
B
which
C
what
D
whom
  Is this school ______ they visited the other day?
#42746
A
that 　
B
which　
C
where
D
the one
In the street I met the professor______ gave us a talk last week.
#43135
A
what
B
which
C
who
D
/
Do you remember the day____we spent together last year.
#42675
A
that
B
what
C
when
D
how