You can come here to ask me ________ if you have any questions.
She had to leave school_______ her family couldn’t afford her education.
The old man has retired from the factory. He _____ there for 30 years.
— I don’t mind telling you what I know. — You _______. I can manage it myself.
The boys enjoy playing basketball __________ many of the girls relax by playing ping-pong.
The teacher asked the students to do the experiment __________ small groups.