They had to_________ before they finished the course because they were not well disciplined.
| A．drop in | B．drop out |
| C．drop off | D．drop by |
相关知识点
推荐试卷
They had to_________ before they finished the course because they were not well disciplined.
| A．drop in | B．drop out |
| C．drop off | D．drop by |
试题篮
()
粤公网安备 44130202000953号
