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
1.句子逻辑意思（一级排除C，D, E ) Only if 不能变成 If .. Only 强调的意思不一样 only in C, D, and E should immediately precede the entire clause that it is meant to modify. Only if只有才
2. 虚拟语气(二级排除A ) in sentences expressing a conditional result (x will happen if y happens), the verb of the main clause should be in the future tense and the verb of the if clause should be in the present indicative. x will happen if y happens 条件状语从句的时态一定要是主句的一级过去式。 即 一般将来时 if 一般现在时 ； 一般现在时 if 一般过去式；
3. 修饰： Also, the intended meaning is distorted when the adverb separately is used to modify required, as in A and C, or taught, as in E. B correctly uses the adjective separate to modify course. 体会所要表达的原始的意思（separately的修饰错误。） adv. adj. n . adv. 修饰 adj. 表示 adj. 发生的状态； adj. , adj. n. adj. 修饰 n. ==》 根据逻辑意思决定 是那种形式。