def make_text_to_translate(source_lines, translation_types):
    """ Returns only lines that need to be translated according to translation_types
    """
    filtered_lines = ''
    l_orig = len(source_lines)
    for i, line in enumerate(source_lines):
        if translation_types[i] > 0:
            filtered_lines += line
            if i < l_orig - 1:
                filtered_lines += '\n'
    return filtered_lines