单选题
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
【正确答案】
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。
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