Laura said that when she ____ to school sh...
Câu hỏi: Laura said that when she ____ to school she had seen an accident.
A. was walking
B. has walked
C. had been walking
D. has been walking
Câu hỏi trên thuộc đề trắc nghiệm
Trắc nghiệm Tiếng anh 10 Unit 9: Preserving the environment !!