Most environmental problems exist because adequate measures for preventing them ____in the past.
Failureisthemotherofsuccess.______yourcourage.
Thepictureofthepark________memoriesofourclasstriplastyear.
IfMarycarriesonworkinglikethis,she’ll________soonerorlater.
I’ll________thematterassoonaspossible.Justhavealittlepatience.
Ican______somenoisewhileI’mstudying,butIcan’tstandloudnoise.