Про­чи­тай­те текст и за­пол­ни­те про­пус­ки A–F ча­стя­ми пред­ло­же­ний, обо­зна­чен­ны­ми циф­ра­ми 1–7. Одна из ча­стей в спис­ке 1–7 лиш­няя. За­не­си­те цифры, обо­зна­ча­ю­щие со­от­вет­ству­ю­щие части пред­ло­же­ний, в таб­ли­цу.

Antarctica does not have any permanent residents, just short-term visitors. There are two groups who can have an impact: tourists and those A _______________________.

While tourists may only spend a relatively short time on landings, usually just a few hours, it is a high-impact time compared to scientists or support workers B _______________________ base. Tourists also by their nature will want to visit the most picturesque and wildlife-rich areas of Antarctica.

Areas that are easily accessible by small boats C _______________________ are relatively rare in Antarctica. So despite its enormous size, tourists become concentrated in a few areas D _______________________. Even a smaller tour ship carries far more people than the entire staff of most Antarctic bases.

One aspect of Antarctic tourism that restricts visitor numbers is the limited tourist season. This limitation is placed by the weather, E _______________________. The limited tourist season, however, coincides with the breeding season for most Antarctic wildlife, with the potential for disturbance.

Tourism in Antarctica is at present self-regulated by the International Association of Antarctic Tour Operators. It was founded in 1991. Now it has over 100 members. This is an organization F _______________________ operators. Such guidelines limit the size of the ships that can cruise the Antarctic waters, and also how many people can be landed at sites.

1.  that sets strict guidelines for its member tour

2.  who go as part of scientific programmes

3.  that take tourists from their ship to shore

4.  where short periods of quite warm weather

5.  and in particular by the movements of sea ice

6.  who spend most of their time on a polar

7.  where most of the landings take place