题目内容
16.Learning to write is learning to think.You don't know things clearly _______ you can write them down.( )| A. | unless | B. | if | C. | since | D. | whether |
分析 学习写作就是学习思考.如果你不能把它们写下来,你就不能清楚地了解事物.
解答 答案:A;unless 除非,如果不;if是否,如果;since由于,自从…以来;whether是否;根据句中信息可知"you can write them down"是"You don't know things clearly"的否定的条件,用连词unless=if not;除非;如果…不;故选A.
点评 比较和分析选项中四个连词的不用含义及其用法是解答该题的关键;还要根据句中信息正确推测该句句意,进而作出解答.
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