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