【题目】Charles Darwin explained the ________ of species on earth in his book that came out in1859.
A.ancestorB.originC.beliefD.custom
在线课程【答案】B
【解析】
考查名词。句意：查尔斯·达尔文在他1859年出版的书中解释了地球上物种的起源。A. ancestor祖先；B. origin起源；C. belief信仰；D. custom习惯，风俗。结合句意可知答案为B。