第20题: [单项选择]It is highly desirable that a new president______ for this college. A. appointed B. is appointed C. be appointed D. has been appointed 参考答案:C 答案解析:本题考虚拟语气在名词性从句中的用法。在“It is + desirable(essential,necessary,critical,etc.)+that"引导的名词性从句中谓语动词用"should