下面是我遇到的一个问题： 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 答案选B， 解释“A will happen if B happens”
46. A study commissioned by the Department of Agriculture showed that if calves exercise and associated with other calves, they will require less medication and gain weight quicker than do those raised in confinement. (A)associated with other calves, they will require less medication and gain weight quicker than do (B)associated with other calves, they require less medication and gain weight quicker than (C)associate with other calves, they required less medication and will gain weight quicker than do (D)associate with other calves, they have required less medication and will gain weight more quickly than do (E)associate with other calves, they require less medication and gain weight more quickly than 选E，为什么这里不用will require? "A will happen if B happens”这个原则就不适用于这里？