78. While some academicians believe that business ethics should be integrated into every business course, others say that students will take ethics seriously only if it would be taught as a separately required course.
(A) only if it would be taught as a separately required course
(B) only if it is taught as a separate, required course
(C) if it is taught only as a course required separately
(D) if it was taught only as a separate and required course
(E) if it would only be taught as a required course, separately
答案是B, 我的疑惑是 only if 跟 if..only翻起來的意思差在哪?
我知道only在不同句意會產生不同意思, 不過我不太懂only在這裡會造成哪種意思的差別, 謝謝!!