RewriteEngine on
RewriteRule  ^index.html$  index.php$1
RewriteRule  ^book/([0-9]+).html$  book.php?id=$1
RewriteRule  ^class/([0-9]+)/([0-9]+).html$  class.php?sort=$1&page=$2
RewriteRule  ^over/([0-9]+).html$  over.php?page=$1
RewriteRule  ^top/(.*)/([0-9]+).html$  top.php?sort=$1&page=$2
RewriteRule  ^list/([0-9]+)/([0-9]+).html$  list.php?id=$1&bid=$2
RewriteRule  ^read/([0-9]+)/([0-9]+)/([0-9]+).html$  read.php?id=$1&bid=$2&cid=$3