A-A+ During the last vacation I visited many areas 2022-08-06 07:15:27 问答库 阅读 177 次 问题详情 During the last vacation, I visited many areas of the United States______I had never seen before.A.whatB.whenC.whichD.where请帮忙给出正确答案和分析,谢谢! 参考答案 正确答案:C