单选题 Diderot was also a philosophical materialist,______ that thought developed from the movements and changes of matter.

【正确答案】 A

【答案解析】这道题测试句子结构知识。believing是现在分词，其余三个选项插入句中都会出现严重的句子结构错误，B和D还会引起句义混乱。