单选题 It is requested that all the students ______ present at the meeting tomorrow.
A. were B. will be C. are D. be

【正确答案】 D
【答案解析】本题测试虚拟语气的用法。表示建议、命令、要求等的动词，如suggest，advise，order， request，demand等，或其相应的名词，所接的名词性从句的谓语应用(should)+do的形式，should常省略。故答案为be。