英语翻译I am too sorry..The mail that you had sent to me arrived

英语翻译
I am too sorry..
The mail that you had sent to me arrived today.
test to be important for April 27th me.Therefore,I was surprised.
A reply didn't come,and I am worried to you.
I wanted to send again mail to you.
But there is a test important very.
I had to study and wasn't able to send mail.
I am sorry.
There is an important test to me on April 27th.
A grade of this test affects a high school in going.
A study is hard so much.
Do you think equally with me?
句子能通顺一点吗?谢咯