18．Open source classes are part of a growing trend to make higher education available_______ all．（　　）
A．toB．ofC．inD．with

分析 開源課程是一個日益增長的使每個人獲得高等教育的趨勢的一部分．

解答 答案是A．本題主要考查介詞辨析．to （表示動作或情感的對象）對于；到，向；給，予等；of關(guān)于；屬于…的；in 在…里面；在某一段時間內(nèi)；用…語言等；在…方面；with和；伴隨；和…一致； 根據(jù)句意，用短語"be available to"表示"對于所有人可利用的"，所以答案選擇A．

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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