填空题

从右栏所给选项中选出与左栏各项意义相符的选项。
51. It lets in light and air into the room.

• [A] boat
  52. It is a road going over a river.
• [B] bridge
  53. You walk on it in a room.
• [C] floor
  54. You sit in it to travel across water.
• [D] street
  55. You go into or out of a house through it.
• [E] window
• [F] door
• [G] garden

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