Not until he promised to return it to me as soon as possible ____ my electronic dictionary to my classmate.
A.had I lent
B.did I lend
C.I had lent
D.I lent
答案:B
题目分析:考查倒装句:句意:直到他答应尽快归还电子词典,我才答应把它借给我的同学。Not until放在句首时,主句要部分倒装,助动词提到主语前面,因为两个动作是同时发生,用一般过去时,所以选B。