I need to take the video tape back_____ the store after school. [ ]

What do you think of your teachers?—Not all the teachers are very strict ________ their students.[ ]

Their car broke down while they ________in the desert.

Tom’s uncle has devoted _________ to charity since he came to China 20 years ago.

Mum, Mary bought a pet dog yesterday. Could you please buy __________ for me? — Sure. But you must look after it yourself.