完形填空。 We always want what we cannot have. When we're young, we want to stay out late, have romantic relationships,and be __ 1 __.However,when we're __ 2 __,we want to go back to being young and we __ 3 __ the days when we didn't have to worry about complex love affairs,__ 4 __ pressure,and money problems.Young people believe adulthood __ 5 __ freedom from parents and schoolwork.When they get older,they feel that __ 6 __ is freedom from work pressure and family responsibilities.To __ 7 __ this feeling, people say,'The grass is always __ 8 __ on the other side.' As __ 9 __,we like to be adults, but as young adults, we __ 10 __ to be young again. We think  about staying out late,__ 11 __ our own money to spend.Suddenly,they see that love can result in __ 12 __ heart s；staying out late makes it hard to get ready for __ 13 __ the next morning.They find out that adult life is not as __ 14 __ as they thought it would be and suddenly,__ 15 __ becomes very scary. Life is __ 16 __.It gives us time to __ 17 __ but also requires us to work.The time will come when we must grow up and we will always look back wishing we __ 18 __ being young a bit longer.That time will not come back.It is normal to want what we cannot have but the _ 19 _ is that to be happy is to appreciate what we have.That is the first step to growing up.__ 20 __ life becomes more complex we will not regret the time we wasted wishing we were adults. (     )1．A.comfortable? (     )2．A.older (     )3．A.like (     )4．A.study (     )5．A.creates (     )6．A.childhood (     )7．A.reduce (     )8．A.greener (     )9．A.researchers (     )10．A.wish (     )11．A.making (     )12．A.healthy (     )13．A.breakfast (     )14．A.rich (     )15．A.life (     )16．A.long (     )17．A.study (     )18．A.stopped (     )19．A.reason (     )20．A.If B．dependent B．defeated B．forget B．job B．shows B．adulthood B．describe B．thinner B．teenagers B．decide B．having B．ambitious B．school B．busy B．love B．short B．think B．enjoyed B．result B．When C．independent C．married C．regret C．age C．means C．parenthood C．experience C．yellow C．adults C．return C．worrying about C．broken C．exercise C．free C．career C．fair C．play C．imagined C．dream C．Unless D．polite D．confident D．miss D．health D．limits D．romanticism D．understand D．colorful D．elders D．stop D．showing off D．excited D．work D．easy D．future D．beautiful D．live D．tried D．truth D．Before