______ he became seriously ill, he still went on working.
---What’s wrong with you, Jack? You look tired.---I ________ to prepare for the final exam last night.
---Lucy, is maths difficult to learn in a foreign school? ---I’m not sure, but no subject can be learned well __________hard work.
--- Mum, I ______ the theatre for minutes, but I left my ticket at home.--- Don’t worry, honey, I will take it to you.
--- __________ does your car need the vehicle repair? --- Every six months.
--- Do you know the big boy ________ helped to catch the thief yesterday ? --- Yes, Li Ming, the chairperson of the Students’ Union .