解析：Not until it was completely dark ___考试试题_四六级

【单选题】Not until it was completely dark ______ working.
A、had they stopped
B、they stopped
C、they didn’t stop
D、did they stop

网考网参考答案：D
网考网解析：
[解析] 倒装结构题。本题考查not until的倒装句型，not until位于句首时，主句中主谓部分要倒装，故选D。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>