Most religions are concerned with the worship of one or several deities as well as with ethical rules of conduct.

A. faith

B. speech

C. thought

D. behavior

【答案解析】本题正确选项D。【译文】多数的宗教都会涉及对神灵的信奉和人类的道德行为准则。【解析】在四个备选项中，A项faith“信心、信念”；B项speech“演讲、讲演”；C项thought“思想”；D项behavior“行为”。这里需要选择和题干中的画线词conduct“行为，举止”意思相近的词，因此，依据题意本题最符合的选项为D。