问题标题：
【5.Themanagerenteredtheofficeandwashappytolearnthatfour-fifthsofthetickets_____.A.wasbookedB.hadbeenbookedC.werebookedD.havebeenbooked答案给的A,tickets用复数,four-fifthsofthetickets后用单数还是复数?】
问题描述：
5.Themanagerenteredtheofficeandwashappytolearnthatfour-fifthsofthetickets_____.A.wasbookedB.hadbeenbookedC.werebookedD.havebeenbooked答案给的A,tickets用复数,four-fifthsofthetickets后用单数还是复数?
潘壮元回答：
5.Themanagerenteredtheofficeandwashappytolearnthatfour-fifthsofthetickets_____.B.hadbeenbooked不知道为什么,接连回答了您的好几个问题,但发现这个题所给的答案A好像是说不通的.因为分数短语...
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