摘要： Do you know the of the saying I just quoted? A. resource B. source C. course D. cause
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Do you know the _________ of the saying I just quoted?
[ ]
A. resource
B. source
C. course
D. cause
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B. source
C. course
D. cause
Do you know the _________ of the saying I just quoted?
A. resource B. source C. course D. cause