未知题型 Although he had looked through all the reference material on the subject, he still found it hard to understand this point and her explanation only _____ to his confusion.(A) extended (C) added(B) amounted (D) turned

未知题型 The organization had broken no rules, but __________ had it acted responsibly.A) neither B) soC) either D) both

未知题型 Cancer is second only __________ heart disease as a cause of death.A) of B) toC) with D) from