Shehassetanewrecord,thatis,thesalesofherlatestbook________50million.
A.have reachedB.has reachedC.are reachingD.had reached在线课程A
解析：
因为that is意为“换句话说，即 (="in" other words, which means)”，而前句中的谓语has set是现在完成时，后一句的谓语动词也应用现在完成时，排除C和D；
又因主语the sales是复数，选出正确答案A。