She is so careful that she always goes over her exercises to ________ there are no mistakes.
A. look for B. make sure C. find out D. think about
She is so careful that she always goes over her exercises to ________ there are no mistakes.
A. look for B. make sure C. find out D. think about
B
make sure是固定词组，意思是“确信”，她检查自己作业的目的是确信不犯错误。