问题
选择题
__________ we had read your letter __________ the true state of affairs.
A．It was until; that we understood
B．It was not until; we understood
C．Until; did not we understood
D．Not until; did we understood
答案
答案：D
题目分析：句意：直到我们读了你的信，我们才理解事情的真实的状况。这里使用倒装句，not until放在句首，后面的主句要部分倒装，助动词did放在主语前面，注意不要和强调句It was not until…that…，混淆， 选D。