A-A+ Erna Hart _______ a good swimmer; she swam acr 2022-08-14 12:06:55 问答库 阅读 202 次 问题详情 Erna Hart _______ a good swimmer; she swam across the English Channel when she was only fourteen years old!A、must beB、must have beenC、could beD、should have been 参考答案 正确答案：A
