1,my friend comes from 【 the】 north of counth,
2,mary is the【better】 player of the two.
3.the hospital bought 【an】 x-ray machine a day before yesterday.
4,a hour is the short time to spend is an university library.
5,in fact,it was 【the】a most exciting game of an year .
6,there is 【an】 exciting pop music concert on the tv
7,these football stars are the 【most】 popular in whole country .
8,in 【the】united states ,people attach much importance to words a thank-you card.
9.we are going to play the tennis in 【the】 afternoon,