106. The method ______ highly effective.
| A．was proved | B．proved as |
| C．proved to be | D．is proved to be |
相关知识点
推荐试卷
106. The method ______ highly effective.
| A．was proved | B．proved as |
| C．proved to be | D．is proved to be |
试题篮
()
粤公网安备 44130202000953号
