Give the correct form/ tense of the verbs in brackets.
Although some groups of people (1. always live) .............. outdoors in tents, camping as we (2. know).................... it today(3. begin)................. to be popular about 50 years ago. The increase in the use of cars and improvements in camping equipment (4. allow).............. more people to travel longer distances into the countryside and (5. stay)............ there in greater comfort. Many campers like (6. be)............. themselves in quiet areas, so they take their tent and food and walk or cycle into the forests or the mountains. Others, (7. prefer)............ to be near people, (8. drive).................. to a public or privately-owned campsite which (9. have)................. up-to-date facilities, like hot shower and swimming pools.
Whether campers are separate in the mountain or on a busy site, they should remember to keep the area clean and tidy. In the forests, they must put out any fires and keep food hidden to avoid (10. attract)..................... animals.