29. The field research will take Joan and Paul about five months; it will be a long time ______ we meet them again.
| A．after | B．before | C．since | D．when |
相关知识点
推荐试卷
29. The field research will take Joan and Paul about five months; it will be a long time ______ we meet them again.
| A．after | B．before | C．since | D．when |
试题篮
()
粤公网安备 44130202000953号
