Alecturerwasgivingalecturetohisstudentsonstress(压力)management.He^9aglassofwaterandaskedtheaudience"How30doyouthinkthisglassofwateris?"Thestudents'answersranged(变化)3120gto500g."

　　 Alecturerwasgivingalecturetohisstudentsonstress(压力)management.He^9aglassofwaterandaskedtheaudience"How30      doyouthinkthisglassofwateris?"Thestudents'answersranged(变化)31    20gto500g.

　　"Itdoesnotmatterontheabsolute32      Itdependsonhow33    youholdit.IfIholditforami?nuteitisOK.IfIholditfora(n)34    Iwillhaveapaininmyrightarm.IfIholditforadayyouwillhaveto35      anambulance(救护车).Itisexactlythe36      weightbutthelongerIholditthe37      itbecomes.”Thewholeaudiencebecamesilentlostinthought.

　　Afteramomentthelecturercontinued38      wecarryourburden(负担)allthetime39      ，wewillnotbeabletocarryonwiththeburdenbecomingincreasinglyheavier40      heavyforustobear.”

　　"Whatyouhavetodoisto41      theglassrestforawhile42      holdingit upagain.”Asisshowninthestoryabovewehavetoputdowntheburdenperiodically43      wecanberefreshedandareabletocarryon.

　　Sobeforeyou44      homefromworktonightputtheburdenof45     down.Don'tcarryitback46      Youcanpickituptomorrow.

　　Whatever burden you are having now onyour47    letitdownfora momentifyoucan.

　　Lifeisshortso48    it!

　　29.A.supported   B.drank   C.needed   D.raised 

　　30. A.heavy   B.pure   C.sweet   D.much 

　　31. A.with   B.from

　　   C.at   D.between 

　　32.A.weight   B.volume   C.height   D.quantity

　　33. A.tight   B.long   C.difficult   D.high 

　　34. A.day   B.second   C.hour   D.half 

　　35. A.require   B.invite   C.call   D.ask

　　36. A.proper   B.same   C.right   D.usual 

　　37.A.less   B.lighter   C.more   D.heavier 

　　38. A.If   B.Unless   C.While   D.Since 

　　39. A.nowandthen   B.littlebylittle 

　　 C.soonerorlater   D.sometimes 

　　40. A.too   B.so

　　   C.rather   D.quite 

　　41. A.putaway   B.putdown   C.putaside   D.putback 

　　42. A.after   B.for

　　   C.by   D.before 

　　43. A.sothat   B.evenif

　　   C.asif   D.assoonas 

　　44. A.leave