通读下面短文，掌握其大意，然后选出可以填入短文空格处的词，并将该词的字母代号（不写出该词）填写在相应的位置上。

A．become B．but C．of D．effort E．challenges F．expensive G．them H．cross I．enough J．safely

Imagine living in a world you can’t see the obstacles（障碍）in your way, the traffic lights at a crossing, or the faces of people around you. For millions （1） the blind, this is a daily reality（现实）. Traditional guide dogs have provided necessary support for the blind, helping them move （2） . However, training a traditional guide dog is unbelievably （3） and takes tons of time. It means that the number of guide dogs is smaller than that of blind people. Luckily, good news comes! Thanks to researchers from Northwestern Polytechnical University（西北工业大学）in China, AI guide dogs may soon （4） available to them. They achieved a breakthrough（突破）using an AI language model.

The researchers are developing an AI guide dog that can help blind people （5） streets, use lifts and walk around indoors without having to be connected to the Internet.

“In recent years, there have been some electronic guide dogs, （6） they cannot have conversations with people or fully understand human instructions,” said Sun Zhe, a teacher at the university. “They can only carry out tasks according to pre-designed programs. They are just cold machines. That’s not （7） .”

“Our research makes it possible for the blind to get better guidance service and be less lonely. Blind people face many （8） in daily life. AI guide dogs can offer （9） a more convenient and safer life.” Sun added. According to the research team, there are still some ways to go before the guide dog can be put into use, and they will put more （10） into it and make it available to people in need as soon as possible.