A-A+ ________ he prepared his lessons well; at othe 2022-08-12 23:14:13 问答库 阅读 198 次 问题详情 ________ he prepared his lessons well; at other times he does very poor work.A. Now and thenB. First and lastC. On one occasionD. At first 参考答案 正确答案：A
