2019-2020学年外研版高中英语选修6课件:高中英语定语从句课件 (共25张PPT)
2019-2020学年外研版高中英语选修6课件:高中英语定语从句课件 (共25张PPT)第1页

Join the following sentences: A plane is a machine. The machine can fly. A plane is can fly.

关系代词的实质

the machine

a machine