While Mr. Liu_______ breakfast, the bell______.
A、had, was ringing
B、was having, rang
C、had, rang
D、was having, was ringing
【正确答案】：B
【题目解析】：上册P167-P169
While Mr. Liu_______ breakfast, the bell______.
- 2024-11-07 21:55:23
- 综合英语（一）(13163)
- 1