北师大版（2019）选择性必修 第一册Unit 1 Relationships Learning about language课件(共32张PPT)

(共32张PPT) 1. To learn about the non-restrictive relative clauses. 2. To use the clauses properly. Learning aims 使用适当的关系词填空。 1. That is the boy ______ mother is a famous musician. 3. The house (__________) they built in 1987 stayed up in the earthquake. 2. We don’t know the number of people ________...