I still remember the earthquake-----that/ which-----happened in 2012 in Sichuan.
Have you read the book--that/ which--was written by Anne Frank?
The first thing ---that----he did after arriving home was doing his homework.
Is this the teacher----who----saved several students from the burning building?
Do you know the lady -----who/ whom/ that---- our English teacher is talking with under the big tree?
It is the tallest building-----that----he has seen so far.
My father bought a new bike for me--whose----price was more than 1,000 yuan.
She said she would do anything -----that----could help her mother recover from the disease.