9．-Is there any chance of my borrowing your ipad？
-For how long？（　�。�----____the end of this week．
A．SinceB．UntilC．FromD．By

分析 --我可以借你的ipad嗎？
--多久？
--直到本周結(jié)束．

解答 答案是B．本題主要考查表示時間的介詞辨析．since自從（過去某一時間起）；until在肯定句中表示"動作延續(xù)到…結(jié)束"；from自從（某一時間）；by 表示"到…時候為止（動作已經(jīng)發(fā)生）"；根據(jù)語境判斷，how long指段時間，指借用的狀態(tài)持續(xù)多久；用until the end of the week表示"借用的狀態(tài)持續(xù)到周末"，所以答案選擇B．

點評 介詞辨析要在掌握各介詞的基本用法和固定搭配的基礎(chǔ)上結(jié)合語境做出符合邏輯、常理的推測．

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