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7．China used 1.2 million tons of coal for heating and gneratingelectricity last year．

分析 中國去年用了120萬噸的煤來供暖和發(fā)電．

解答 generating     generate是一個動詞，意為"形成，造成；產生（能量），發(fā)（電）"，通過前面部分used 1.2 million tons of coal （用煤）可知，是用來發(fā)電的，generate electricity意為"發(fā)電"，又因為前面有介詞for，heat和generate作為for的兩個并列賓語，都要加ing，故填generating．

點評 考查動詞的詞義，在熟記單詞詞義的基礎上還要聯(lián)系語境，從而寫出正確答案，寫動詞時還要注意其人稱、時態(tài)和語態(tài)的變化．

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