His conclusion, on careful research, was acceptable.A. to baseB. to be basedC. basingD. b

发布时间：2020-08-17 09:52:22

His conclusion,      on careful research, was acceptable.
A. to base
B. to be based
C. basing
D. based

网友回答

A. to base
B. to be based
C. basing
(答案→)D. based
解析：考查非谓语动词。句中be based on以……为基础，在句中作定语，修饰His conclusion，相当于定语从句which is based on…，故选D。
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