Language points
An idiom is a group of words or an expression whose meaning often cannot be understood by looking at the meanings of the separate words in it. Page 50 , line 1
whose
关系代词whose 引导定语从句,它既可以指代人,也可以指代物,既可引导限制性定语从句,也可以引导非限制性定语从句。
①Mr King, whose legs were badly hurt, was taken to the hospital. 金先生腿受重伤,被送进了医院。
②They live in a room whose window opens to the south. 他们住 在一间窗户朝南开的房间里。
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