Ithinktheanswershouldbe:

　　1.look,youaremakingsuchsillymistakesallthetime.

　　2.Usually,acurrencyisassociatedwithonecountryonlysoitiseasiertofindimagesandsymbolstoputonthecoinsandnotes.

　　3.Tobeapartofthisexcitingevent,allyouneedtodoistoenteryourfavouriteadvertisement.

　　我觉得应该不会错,因为我在我的国家是说英语的,然后都是这样说的.

　　=)

　　希望可以帮到你哦!

　　然后,补充一下,第一题,我觉得如果用'havebeenmaking',就不用'allthetime'了.

　　#2,thelastanswershouldbe'toputon',because'puttingin'doesnotmakesense.TheywantthesymbolsTOPUTONthenotesandcoins.Asin,theywanttoprintthesymbolsonthecurrencynotes...^^

　　至于#3,allyouneedtodoisto_______.Thisisthecorrectenglish.Rarelypeopleuse'whatyouneedtodoisto..’,thatsoundslikechinese.

　　=)