填空题 The course leader requests that all (theses) (are) handed (in) before 5:00 p.m. (next Friday). A. theses B. are C. in D. next Friday
  • 1、
【正确答案】 1、B改为be。    
【答案解析】request引导的从句中需用虚拟语气，结构为(should) do。