用所给词的适当形式填空

has life walk miss do able give make enough save Don✀t waste time because time___ will never return Time passes very quickly.Some students say they do not have ___ time to do their lessons.They do not know how ___ use of their time.They waste it in going to the movies,playing games and ___ other useless things.Why do we go to school early in the morning? Why do most people ___ to take buses instead of ___ ? The answer is very simple :We wish to ___ time because time is precious. We know that time si ___ . When a person dies, his time has ended. Since life is short, we must ___ our time to our studies so that we may be ___ to work for our country.