____hemadeuphismindthatheavyobje

发布时间：2020-07-27 01:56:13

____ he made up his mind that heavy objects fell faster than light ones, he taught it as a truth to his students. A.ThoughB.WhichC.ForD.Once

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D解析连词once引导状语从句，意思是“一旦他认定……”．填though引导让步状语从句，句子的意义不通，for引导原因状语从句，应置于主句之后．Which不引导状语从句．
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