mod_rewrite removing name of query string

mod_rewrite removing name of query string

I have big problem with my urls. I know how to remove index.php form url,
but problem is that I don't know to remove that "?act=" from url.
My link now is http: //localhost/doctrine/public/?act=test and I want to
create it like http: //localhost/doctrine/public/test.
My current .htaccess file placed in public folder:
<IfModule mod_rewrite.c>
RewriteEngine On
# Removes index.php from ExpressionEngine URLs
RewriteCond $1 !\.(gif|jpe?g|png)$ [NC]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]
</IfModule>
I need help how to do that.