四级阅读选词填空题的两原则和五“定”法
nly about 1% of the market today.
Energy and sustainability experts say the answer to our future energy needs will likely come from a lot of 56 —both traditional and alternative.
根据空格前后的内容,并依据必要的语法规则,我们可以判断出每个空格处应填入单词的词性及语法形式。例如,对于第47题,考生可以根据空格前面的this判
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