Why is it crashing? (newbie)

[Charles Mantha]

Yup, a newbie question again :/ .
I am trying to run a small toy program which I modified from a tutorial.
It's a questionnaire that uses lists which contains the questions and
answers. Every time I try to run this prog it freezes my Python Shell
interpreter (IDLE).
This is the code :
## This program runs a test of knowledge

true = 1
false = 0


def menu():
    print "'1' Take the test."
    print "'2' View the questions and answers."
    print "'3' Quit."
    print

# First get the test questions
def get_questions():
    # notice how the data is stored as a list of lists
    return [["What color is the daytime sky on a clear day?","blue"],\
            ["What is the answer to life, the universe and
everything?","42"],\
            ["What is a three letter word for mouse trap?","cat"],\
            ["What noise does a truly advanced machine make?","ping"]]

# This will test a single question
# it takes a single question in
# it returns true if the user typed the correct answer, otherwise false
def check_question(question_and_answer):
    #extract the question and the answer from the list
    question = question_and_answer[0]
    answer = question_and_answer[1]
    # give the question to the user
    given_answer = raw_input(question)
    # compare the user's answer to the testers answer
    if answer == given_answer:
        print "Correct"
        return true
    else:
        print "Incorrect, correct was:",answer
        return false

# This will run through all the questions
def run_test(questions):
    if len(questions) == 0:
        print "No questions were given."
        # the return exits the function
        return
    index = 0
    right = 0
    while index < len(questions):
        #Check the question
        if check_question(questions[index]):
            right = right + 1
        #go to the next question
        index = index + 1
    #notice the order of the computation, first multiply, then divide
    print "You got ",right*100/len(questions),"% right out
of",len(questions)

menu()
menu_choice = int(raw_input("Choose one of the options: ")),
while menu_choice != 3:
    if menu_choice == 1:
        run_test(get_questions())

Note : The "calling" part of the code is not finished for the options 2 and
3. But It should at least run the test when you type in 1, no ?