单选题 When you are in your room, leave the door ______ so that your visitors do not have to knock.
  • A. open
  • B. opened
  • C. opening
  • D. being open
【正确答案】 A
【答案解析】[解析] “leave...+v.”表示“让…保持一种状态”,后面应该用动词原形或形容词形式。