题目内容：

    Japan’s biggest airline is betting that the future of travel isn’t traveling at all.

For the last month, a married couple has been interacting with a robot—called an Avatar—that’s controlled by their daughter hundreds of miles away. Made by ANA Holdings Inc., it looks like a vacuum cleaner (真空吸尘器) with an iPad attached. But the screen displays the daughter’s face as they chat, and its wheels let her move about the house as though she’s really there.

“Virtual travel” is nothing new, of course. Storytellers, travel writers and artists have been inspiring the senses of armchair tourists (足不出户的旅行者) for centuries. It’s only in recent decades that frequent, safe travel has become available to the non-wealthy.

Yet even as the worlds middle classes climb out of the armchair and into economy-class seats, there are hints of a post-travel society coming. Concerns about sustainability (可持续发展) are causing a loss to carbon-intensive airlines, which do harm to our environment. And the aging of wealthy societies is both limiting physical travel and creating demand for alternative ways to experience the world. For the travel industry, virtual reality offers an inviting response to these trends.

Of course, far-out technologies encourage far-out claims. ANA doesn’t plan to start selling Avatars until next year. Profits, too, will probably be a barrier. By one estimate, the global market for this kind of technology will be worth only about $300 million by 2023. By contrast, ANA’s traditional travel business brought in more than $19 billion last year.

But if the business case for virtual vacations is still weak, the market for technologies that bridge physical distances between families and coworkers seems likely to only expand. ANA’s robots may not replace its airplanes any time soon, but they’ll almost certainly be a part of travels high-tech future.

1.What do we know about Avatar?

A.It’ll take the place of ANA’s airplanes soon.

B.It s a kind of the latest vacuum cleaner.

C.It is invented by ANA Holdings Inc.

D.It’s on sale right now.

2.What prevents Avatars coming into market at present?

A.Lower Profits. B.Aging society.

C.Physical distances between families. D.Concerns about environment.

3.The writer s attitude towards future virtual travel is ________.

A.Critical. B.Objective.

C.Doubtful. D.Positive.

4.What’s the best title for the passage?

A.Difficulties for the armchair tourists

B.The coming trend of virtual vacation

C.Something about virtual reality

D.The popularity of Avatar