问题补充：
单选题
The librarian promised to get the book for me ________ she could remember who last borrowed it.A.every sinceB.in caseC.if onlyD.even if
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热心网友 1楼
C解析C项if only有两个意思：①“只要”，eg: If only it clears up, we'll go.②“要是……就好了”，eg: If only you had worked with greater care! 本题是第①个意思。A项表示“自从”，B项表示“以防万一；以免”；D项表示“即使”。
