请教一个关于 unexpected T_STRING 的问题;怎么改呢,谢谢!

如下代码,提示mysql_select_db('sample');出错: syntax error, unexpected T_STRING in C:\Program Files\Apache Group\Apache\test\xwgl\admin\do.php on line 13require_once('../inc/config.php');
$action=$_POST['action'];
$conn=mysql_connect(MYSQL_HOST,MYSQL_USER,MYSQL_PASS)
mysql_select_db('sample');
or die('数据库连接不成功');
if("addnews"==$action){
$sql="insert into".NEWS_BASE."values("
.$_POST['news_title'].","
.$_POST['news_text'].","
.$_POST['news_date'].","
.$_POST['author']."')";
mysql_query($sql,$conn)or 
die("插入数据失败原因".mysql_error());
echo "<script lang='javascript'>\n";
echo " alert('添加新闻成功')\n";
echo "window.location='addnews.php';\n";
echo "</script>";
}