Here's another idea...

Code:

---

string the_question;
string tStr;
function select_question(number)
{
    str_for_num(tStr, number);
    str_cpy(the_question, "str_cpy(tStr, question_");
    str_cat(the_question, tStr);
    str_cat(the_question, ");");
    execute(the_question);
    str_cpy(the_question, tStr);
}

---

This will work with any number of strings, without using a ton of "if" statements.