问题
选择题
| The teacher, along with his students, _____ experiments in the laboratory when the explosion happened. |
A. were doing B. have been doing C. was doing D. had done |
答案
答案：C
搜题请搜索小程序“爱下问搜题”
| The teacher, along with his students, _____ experiments in the laboratory when the explosion happened. |
A. were doing B. have been doing C. was doing D. had done |
答案：C