阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
Great progress      (achieve) recently and the new robot guides at a Tokyo museum look so       (strange) human and speak so smoothly that they almost outdo people.
   (Japan) robotics expert Ishiguro says they will be    (use) for research on how people interact with robots and on how humans are different from machines. “       (make) robots is about exploring       it means to be human,” he says, “and examining the question of what is emotion, what is awareness, and what is thinking.”
In a demonstration，the remote-controlled machines moved their pink lips    time to a voice-over, twitched their eyebrows，blinked and swayed their heads from side to side. They stayed    (seat) but could move their hands.
In a clear presentation, a robot read the news without stumbling（结巴）once and recited complex tongue-twisters. The robot, designed with a girlish appearance，can use a variety of voices，such as a deep male voice one minute and a soft girly voice the next. The speech can be input by text, giving them perfect      (pronounce)，according to the designers.
There were some faults-such as the lips not moving at all while the robot spoke or the Otonaroid announcer robot staying silent twice when asked to introduce itself.     faults are common with robots because they are delicate and sensitive to their environment.