Read the following passage and choose a suitable word to fill the blank .
                          do ;  planets ;   help ;   types ;       show ;     buildings  
Today there is an international robot 1) .................in Ha Noi. Many people are at the show. They can see many 2).................... of robots there.
Young people are interested in home robots. These robots can cook, make tea or coffee, clean the house and 3)....................the laundry. The children like to see teaching robots. These robots can help them study. Teaching robots can teach them English, literature, math and other subject. They can 4) ...................English pronunciation. Other types robots are also at the show. These robots can do many things. Worker robots can build houses 5)................  doctor robots can help sick people;  and space robots can build space stations on the Moon and on planets.