_________ men have learned much from the behavior of animals is hardly new.A、Tha

游客2023-11-14 18

问题 _________ men have learned much from the behavior of animals is hardly new.

选项 A、That
B、What
C、Whether
D、Which

答案 A

解析 “That”引导名词从句，作句子的主语。例如：That he will succeed is certain．

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