SAT I 一日一问:2014年3月6日
来源:CollegeBoard
2014-03-06 10:00
The correct answer is E
Explanation
Choice (E) is correct. There is no error in the sentence. As it appears in the sentence, “guinea pig” is singular and requires a singular verb and a singular pronoun. Also, the sentence appropriately uses the parallel “not [this]…but [that]” construction.