His conclusion, ______ on careful research, was acceptable.
| A．to base | B．to be based | C．basing | D．based |
相关知识点
推荐试卷
His conclusion, ______ on careful research, was acceptable.
| A．to base | B．to be based | C．basing | D．based |
试题篮
()
粤公网安备 44130202000953号
