Unit 1（）Text B. VocabularyReplace the underlined word in the following sentence with one of these words and change the form where necessary. (integral, salient, deviate, scratch the surface, malevolent, pervade, domain, indicative, nourishment, bound)30.

Unit 1（）Text B. VocabularyReplace the underlined word in the following sentence with one of these words and change the form where necessary. (integral, salient, deviate, scratch the surface, malevolent, pervade, domain, indicative, nourishment, bound)30. Centuries of war, poverty, and hardship penetrate the history of the human species.
正确答案：pervade