当前位置: 初中英语 / 单选题
  • 1. (2019·惠山模拟) —The light in the professor's lab was still on at 11:00 o'clock. Do you know     ?

    —maybe at midnight again.

    A . how long has he worked B . why does he stay up so late C . if he is busy studying D . when he stopped working

微信扫码预览、分享更方便