The scientist could hardly find sufficient grounds （） his arguments in favor of the new theory.（1分）<br>A、which to base on<br>B、to base on<br>C、to be based on<br>D、on which to base

The scientist could hardly find sufficient grounds （） his arguments in favor of the new theory.（1分）
A、which to base on
B、to base on
C、to be based on
D、on which to base

出自：山东第一医科大学2022年下半年英语2（本）在线考试

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