Dear,xxx.
I feel so sorry for hearing of your last English test.But don't worry about it too much and take it easy,beacuse everything will be ok if you work harder on it.There are some pieces of advise that may give you some help.First,to pay much attention when you are at class is the most important.Then do some listening and reading exercise everyday in your spare time,since,in my view,they are the key of advance your English.Last but not the least,try to love english by listening English music or watching English movies,and you will find you are better on your next test.
sincerely your,
xxx