在数列$\left\{a_n\right\}$中，$a_1=2$，$2a_{n+1}=2a_n+1$，则$a_{101}$的值为  （    ）

   Football is, I do think, the most favorite game in England. It is one of the important  1 to see. Rich and poor, young and old, one can see them. To a stranger, one of the most surprising things about football in England is the great  2  of the game which even the smallest boy seems to have. He can  3you the names of the players in most of the important teams; he has pictures of them and knows the  4  of Large numbers of matches. He will tell you who he hopes will  5  such a match, and his ideas about football are usually as good as those of men three or four times his age.