u2单词

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Across
  1. 3. the flat surface that you walk on inside a building
  2. 4. an opening in a wall or door that lets in light and air, usually covered with glass
  3. 6. free from dirt, dust, or marks, or to make something free from dirt
  4. 8. a dark surface used for writing on with chalk in a classroom
  5. 9. a room in a school where students have lessons
  6. 14. away to put something back in the place where it is usually kept
  7. 16. to continue to have something, or to put something in a particular place
Down
  1. 1. not clean, covered with dust or marks
  2. 2. to shut something, or to move something so that it covers an opening
  3. 5. a table used for writing or working, often with drawers
  4. 6. a piece of furniture for one person to sit on, with a back and four legs
  5. 7. right used to show agreement, or to say that something is acceptable or satisfactory
  6. 10. to allow or permit someone to do something
  7. 11. to clean a floor using a brush
  8. 12. belonging to or connected with us
  9. 13. too used to say that you agree with someone or that you have done the same thing
  10. 15. used to refer to the speaker and one or more other people as the object of a verb or preposition