1. Lance Bass wasn’t able to go on a tour of space because of health problems.

　　2. Several tourism companies believe space travel is going to be a new profitable industry.

　　3. The space agencies are reluctant to open up space to tourists.

　　4. Two Australian billionaires have been placed on the waiting list for entering space as private passengers.

　　5. The price for the winner in the fall 2001 NBA TV game show would have been ________.

　　6. Hilton Hotels believes it won’t be long before it is possible to build a ________.

　　7. In order for space tourists to walk around and function normally, it is necessary for the space city to create a ________.

　　8. What making going to space the most expensive vacation is the enormous cost involved in ________.

　　9. Each year 500,000 space tourists could be flying into space if ticket prices could be lowered to ________.

　　10. Within the next two decades, ________ could be as intercity air travel.

　　Unit 2

　　1. N 2. Y 3. Y 4. NG

　　5.a trip to the Mir Space Station

　　6.a space hotel

　　7.small gravitational

　　8. the fuel of spacecraft

　　9.$50,000

　　10. space travel