They are letting us use their computer, and __________ we are giving them the results of our research.
#27342
A
in charge
B
in place
C
in return
D
in a row
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They argued________the waiter________the price of the meal in the restaurant.
#26108
A
with；to
B
about；with
C
to；about
D
with；about
______I used to go mountain—climbing every summer .
#28699
A
at a time
B
at one time
C
At times
D
At the same time