2．An average of just 18.75cm of rain fell last year，making ______ the driest year since California became a state in 1850．（　�。�
A．eachB．itC．thisD．one

分析 去年降雨量平均僅是18.75cm，是加利福尼亞自從1850年成為一個(gè)州以來最干旱的一年．

解答 答案B
each指代個(gè)體，強(qiáng)調(diào)"每一個(gè)"；it可指代時(shí)間、距離、天氣、環(huán)境等；this 意思是"這個(gè)"，通常this不用來修飾不可數(shù)名詞，因?yàn)椴豢蓴?shù)名詞沒有"這個(gè)"的概念；one代替上文出現(xiàn)的可數(shù)名詞單數(shù)，指同名同物．此處是指last year，故選B．

點(diǎn)評(píng) 區(qū)分開指示代詞的用法是做此類題的關(guān)鍵．

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