Having prepared himself well for the realtor exams and having exhausted everyone in the family with his requests that someone help him with the true-and-false drills, Jeffrey, who had never been a particularly good student in high school, knew he was ready to take on the greatest challenge of his life.
A.This sentence is correct
B.drills; Jeffrey
C.Jeffrey - who had never been a particularly good student in high school - knew
正確答案:This sentence is correct