[讨论]可否问一个很笨的OG问题???

37. 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

Ans B
                

我要问的是
                

Q1像是B as a separate, required course

究竟何时形容词
                可以像这样两个中间不用and连接

何时要用呢???

Q2是不是有个tip说
                遇到only if 还是only +V 答案必错
                我只是想确认一下
                

谢谢!!