题目内容:
Whatdidtheworkersdowhentheyfoundthethirdfloorleanednorthwards? A.Theythoughtitwouldnotcausetroubleandcontinuedtheirwork.
B.Theymadethestructureofthethirdstorytowardsthenorthtaller.
C.Theydemolishedthetowerandrebuiltitfromthebeginning.
D.Theyaskedhelpfromexpertsandsuccessfullystoppedtheleaning.
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答案解析: