Who took care of you when you were a toddler?

A. Who used to take care of you when you were a toddler?

B. Who uses to take care of you when you were a toddler?

C. Who used to take care of you when you was a toddler?

D. Who didn’t used to take care of you when you were a toddler?

E9- TĐ- Unit 4 (1)