I _____ his telephone number. Had I known it, I would have rung him up. A. don’t known B. didn’t kno...
2022-11-30 10:53:02 21次 2015届辽宁省高二上学期期中考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
I _____ his telephone number. Had I known it, I would
have rung him up.
A. don’t
known
B. didn’t know
C. hadn’t
known
D. haven’t known
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