Since most if not all learning occurs through ______, relating one observation to another, it would be strange indeed if the study of other cultures did not also illuminate the study of our own.
【正确答案】
C
【答案解析】- 方程等号：第一个逗号说明前后同义重复。 - 强词和对应：空格和relating one observation to another构成同义重复，体现把一个观察和另外一个观察“联系”起来。assumption假设，experiment实验，comparison比较，repetition重复，impression印象。答案选C。