题目内容：

    On the school playground in Los Tomes, José, a lone child, plays a ball­and­cup game. The eight­year­old is the school's only pupil. His teacher, Nilda, herself a former pupil, says that enrolment(注册入学) has dropped from 65 when she started teaching 43 years ago. Drought has driven families away, she says, “Only the old remain.”

Los Tomes is an agricultural cooperative, one of 178 in Chile's Coquimbo region. Nineteen communities try to grow wheat and raise sheep and goats on 2,800 hectares. A decade­long drought has made that harder. Hilltop springs where the animals once drank have dried up. As the number of herds(畜群) decrease, farmers' children moved away to take jobs in cities or at copper mines.

①  Hope for Los Tomes comes in the form of three 60­square­metre nets stretched between poles on a ridge(山脊) above the community. These nets capture(捕捉)droplets(水珠) from the fog that rolls in from the sea 4 kilometers away. They flow down to two troughs(槽), from which animals drink. The nets can harvest 650 litres of water a day.

②  Chile has been investigating fog capture since the 1950s. The fog can be harvested with the help of a coastal mountain range and strong winds. Earlier attempts to turn the mist into usable water failed. In 1990 fog nets at a fishing village captured 8,000 litres a day. Villagers argued about how to share responsibility for maintaining the nets.

Climate change, which is expected to decrease rainfall in the region, has inspired a new search for sources of water. The project at Los Tomes is part of an attempt to capture fog. “The question is not whether the fog collectors work but who's going to provide and maintain them,” says Daniela.

At a community north of Los Tomes, three 150­square­metre fog catchers feed a plantation of young olive trees. When the trees mature, they will produce 750 litres of organic olive oil a year. The water source will be a big selling point. A privately owned brewery(啤酒厂)in Pena Blanca was quick to spot fog water's marketing appeal.

③  The development fund paid 5.6 million pesos each piece to put up the structures in Los Tomes；when the nets wear out, the villagers will have to replace them at a cost of 100,000 pesos each. Coquimbo has more than 40,000 hectares of land with the right conditions for putting up fog­catchers. If it were fully employed, the region could harvest 1,400 litres a second, enough to supply all its drinking water.

④  That might attract back educated young people from the cities. A chance to develop tourism near the Fray Jorge national park, a rainforest which has survived thanks to its own natural fog­collection mechanism, brought Salvador to his birthplace. “Roots, the land and the desire to start this brought me back, says Salvador.

1.The boy in the first paragraph is used as an example to show  .

A.the seriousness of drought B.the poverty of the area

C.the trend of the move D.the lack of teachers

2.The ideal place for nets should be .

A.in the rough sea B.on a coastal ridge

C.over the sea D.at the foot of the ridge

3.The concern of the fishing village's people is   .

A.whether the fog­catcher works

B.whether the fog­catcher can provide enough water

C.how to make the fog­catcher run well continuously

D.how to make use of the water

4.The sentence “It makes a profit, but most fog­harvesting projects require investment in their early stages.” should be put in   .

A.① B.② C.③ D.④

5.According to the passage, which of the following statement is right？

A.Water collected from fog can be sold as beer on the market.

B.Daniela suggests that olive trees should be planted in the plantation.

C.The products made with fog water will probably appeal to the consumers.

D.Part of temperate rainforest's survival is due to the use of man­made fog nets.

6.Salvador returning to his birthplace mainly wants to   .

A.protect the remaining forest B.build more fog­catchers

C.sell handicrafts on the road stands D.develop local tourism