题目内容
.His conclusion, ______ on careful research, was acceptable.
A.to base | B.to be based | C.basing | D.based |
D
解析
练习册系列答案
相关题目
题目内容
.His conclusion, ______ on careful research, was acceptable.
A.to base | B.to be based | C.basing | D.based |
D
解析