def build_score_args(args):
    """Compose command line for the `score` program."""
    command_line = []
    if args.labels_file:
        command_line += [
            '--SourceLabels',
            '--SourceLabelCountsLHS',
            '--SourceLabelSet',
            ]
    if args.parts_of_speech:
        command_line.append('--PartsOfSpeech')
    if args.inverse:
        command_line.append('--Inverse')
    if args.args is not None:
        command_line.append(args.args)
    return ' '.join(command_line)