问题
选择题
They are letting us use their computers, and _____ we are giving them the results of our research. [ ]
A. in turn
B. in theory
C. in return
D. in general
答案
答案：C
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They are letting us use their computers, and _____ we are giving them the results of our research. [ ]
A. in turn
B. in theory
C. in return
D. in general
答案：C