A-A+ There are three days ______ are usually marked 2022-08-01 22:15:43 问答库 阅读 167 次 问题详情 There are three days ______ are usually marked by some kind of special ceremony.A．whoB．thatC．whenD．whose 参考答案 正确答案：B解析：语法题。that在句中做主语；when是副词，在句中不能做主语。
