问题标题：
Onlyaftertalkingtotwostudents__________thathavingstrongmotivationisoneofthebiggestfactorsinreachinggoals．（）A.IdiddiscoverB.didIdiscoverC.IdiscoveredD.discovered
问题描述：
Only after talking to two students __________ that having strong motivation is one of the biggest factors in reaching goals．（）
A.I did discover
B.did I discover
C.I discovered
D.discovered
郭烁回答：
答案为B
only位于句首时，后接after为首的介词短语，主句要用部分倒装，结合从句意思应用一般过去时，故选B．
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