Read the following passage then 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.
Trả lời câu hỏi dưới đây:
_____ (6. be)