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The field research will take Joan and Paul about five months;it will be a long t
ThefieldresearchwilltakeJoanandPaulaboutfivemonths;itwillbealongtime_____wemeetthemag...
The field research will take Joan and Paul about five months;it will be a long time_____we meet them again.
A. after
B. before
C. since
D. when 展开
A. after
B. before
C. since
D. when 展开
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