I just took the U.S HISTORY REGENT i just came to america so dont know much abut US HISTORY BUT I tried.....?

i did great on the multiple choice and DBQs questions but i didnt do good on both of the essays specially on the DBQs essay ,on the first essay i wrote abut the 19th and 18th amendment i did good on 19th but for 18th i just wrote men used to beat their wives and spend money on alcohol and stuff and the it was passed and i could not remember what effect it had after it was ratified on economy ....and for the DBQ essay i did really bad i did not understand the similarities and also differences i think i will fail that eassy............SO CAN SOMEONE PLZ tel me can i still get a 80 or something cause i did good on multiple choice and dbq questions?