题目内容

After a 5-year absence, we returned to our mother school, and not until then it was such a beautiful school.

A.
we realized
B.
had we realized
C.
we had realized
D.
did we realize

D
解析：
考查部分倒装。not until放在句首时，后面句子要部分倒装，排除A,C；根据then，可知要用一般过去时态，所以选D。

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After a 5-year absence, we returned to our mother school, and not until then it was such a beautiful school.

A. we realized B. had we realized C. we had realized D. did we realize

After a 5-year absence, we returned to our mother school, and not until then it was such a beautiful school.

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