填空题。

     People might be surprised to learn that about 50 million people in the world use, or could benefit from

the use of, a wheelchair. Actually,   1   wheelchair is one of the simplest devices   2   are available to

assist the disabled. With the development of science and technology, other   3   (advance) forms of

devices like robots might come into use.

     For years scientists   4   (devote) themselves to developing new types of robots that can be of help to

the disabled. It remains to be seen what will come out of their efforts, but   5   is for sure is that these

robots should meet the following standards.

     First of all, they should be easy  6  (operate). Secondly, they must be able to perform multiple functions. All in all, they should enable the disabled to live as normal a life as able-bodied people.

If one day their dreams come true, these robots can be hugely beneficial to all of us. With the assistance

of a robot, people living with   7   (disable) may find   8   easier for them to handle life. However, the

most difficult thing for   9   is not the inconvenience in their lives, but the prejudice. Therefore,   10   we

get rid of the prejudice, they can not be truly comfortable.