题文
Don’t leave your seat ________ all the papers have been collected by the teacher.
| A．after | B．when |
| C．since | D．until |
Don’t leave your seat ________ all the papers have been collected by the teacher.
| A．after | B．when |
| C．since | D．until |
试题篮
()
粤公网安备 44130202000953号
