题目

. Oil prices have risen by32 percent since the start of the year,_____a record US $57.65 a barrel on April 4.  A. have reached B. reaching  C. to reach D. to be reaching 答案：B 解析: 分词做结果状语，不能选C，因为不定式作为原因和结果状语时候不能放句子开头。

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