As students, we should ________ our study.A.pay forB.spend onC.concentrate on
My mother___________ for 3 days in Shanghai.
- Tom, where is your father? - I’m not sure. He _______ in his office.
Show me another T-shirt. This one is __________ for me.
- What should I do? - You should ask your parents for ________.
My mother would stay at home to watch TV _______ out for a walk.