问题
选择题
—When did you return to Nanjing last Friday?
—It was not until midnight _______ it was snowing heavily. [ ]
A. that
B. before
C. while
D. when
答案
答案：D
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—When did you return to Nanjing last Friday?
—It was not until midnight _______ it was snowing heavily. [ ]
A. that
B. before
C. while
D. when
答案：D