24. Remember never to tell a lie to others. If you did, you would never ______it and it is more _____ that you will be discovered before long.

It’s well known that good relationship between two countries __________ the development of mutual culture and economy.

help you, sir—I’m afraid you can’t I have my students’papers________

His son often ______with me after school.

My _______ brother will go to America for ________ study next year.