帮忙找这几个句子错在哪儿吧

帮忙找这几个句子错在哪儿吧
On the Sunday morning I usually do housework at the home.
My friend comes from anorth of country.
Mary is the good palyer of the two.
The hospital bought a X-ray machine a day before yesterday.
A hour is the short time to speng in an uniersity library.
In fact,it was a most exciting game of an year.
There is a exciting pop music concert on the TV.
These football stars are the very popular in whole country.
In U nited States,people attach much importance to words on a thank-you card.
We are going to play the tenni in an afternoon.