wp_set_object_terms… question.

I need to put 3 values with wp_set_object_terms
these are categories. how can I change it to put all of 3 values?

I need to put…

province1, province2, province3
city1, city2, city3

to City category…

### get values
$province = $_POST['province'];
$city = $_POST['city'];
//echo "pro=". $province."<br/>";
if(sizeOf($province)!=sizeOf($city)){
     echo "Error!";
     exit;
}
for($i = 0 ; $i < sizeOf($province); ++$i){
     //echo $province[$i]." / ";
     //echo $city[$i]."<br />";
   //if ($i=1) {
      //$province1=$province[$i];
   //}
}
$posted = stripslashes_deep( wp_array_slice_assoc( $_POST, $fields ) );
$posted[province1]=$province[0];
$posted[province2]=$province[1];
$posted[province3]=$province[2];
$posted[city1]=$city[0];
$posted[city2]=$city[1];
$posted[city3]=$city[2]; 

################## Province, City insert...###########################
$post_into_provinces = array();
if ($posted['province1']>0) $post_into_provinces[] = get_term_by( 'id', $posted['province1'], 'city')->slug;
if (sizeof($post_into_provinces)>0) wp_set_object_terms($resume_id, $post_into_provinces, 'city');
$post_into_cities = array();
if ($posted['city1']>0) $post_into_cities[] = get_term_by( 'id', $posted['city1'], 'city')->slug;
if (sizeof($post_into_cities)>0) wp_set_object_terms($resume_id, $post_into_cities, 'city');