第10题: [单项选择]Not until 1959 ______ this compound. A. that chemists succeeded in obtaining B. did chemists succeed to obtain C. chemists succeeded in obtaining D. did chemists succeed in obtaining 参考答案:D 答案解析:[解析] 本题考查倒装句的用法。当否定词位于句前时,句子应用部分倒装。词组“be succeeded in+doing”表示:在哪方面取得成功。