单选题 It is desirable that the airplane______as light and fast as possible.
  • A. be made
  • B. is made
  • C. were made
  • D. has been made
【正确答案】 A
【答案解析】[解析] 在It is/was advisable/desirable/essential/important/imperative/necessary/normal/ preferable/vital等形容词+that+结构的主语从句中，谓语动词英国英语用should+ 动词原形，而美国英语只用动词原形，故本题答案是A。