题目内容
His conclusion, ______ on careful research, was acceptable.
A.to base????????????? B.to be based????????????? C.basing????????????? D.based
【答案】
D
【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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