embarrass是尴尬的意思,不怎么恰当．用sorry
that I can't attend你是无法去上课
As改成because,2008前加the
But I will make sure to catch up with my classmates as soon as possible.
receive改成get更得体
Thanks for understanding你是想说谢谢理解吗?太中式化了．Forgive me please.
Yours student是错误的说法．你可以说是Your student或就一个Yours
Li Ming写在Yours的下面