17．In recent years an English word"infosphere"has appeared，__________the sense of"information"and"atmosphere"．（　�。�
A．combineB．combinedC．combiningD．being combined

分析 句意：最近幾年，出現(xiàn)了一個英語單詞"infosphere"，此單詞結(jié)合了"信息"與"氣氛"兩個詞義．

解答 題干中的橫線上可以填上which combines，關(guān)系詞which在從句中充當主語，不能省略．所以選項A、B錯誤．
D選項being done表示一個正在進行的被動動作，而動詞combine與其邏輯主語infosphere構(gòu)成主謂關(guān)系，故D錯誤．
由句意可知，后面一個句子是修飾前面的名詞infosphere，因而需要一個定語從句，而現(xiàn)在分詞的句子可以等同于一個定語從句，所以用現(xiàn)在分詞doing，非謂語動詞combining與其邏輯主語infosphere構(gòu)成一個主謂關(guān)系，所以選C

點評 此題考查現(xiàn)在分詞的用法．非謂語動詞有三種基本形式：現(xiàn)在分詞（doing）、過去分詞（done）、不定式（to do）．現(xiàn)在分詞表示一個主動的或正在進行的動作或狀態(tài)；過去分詞表示一個被動的或完成的動作；不定式表示一個將要發(fā)生的動作．解題時一定要判斷好動詞與其邏輯主語的關(guān)系，動作所處的狀態(tài)．

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