Unit 4 Global warming.阅读理解AWildfires and heat waves have been troubling the states of California and Arizona this year. Since 2010, about 6.4 million acres have been burned on average per year. Recent studies have stated that global warming is the cause of these wildfires and higher temperatures, and that the incidence of these natural disasters is likely to increase.As temperatures increase, wildfires become more common. As this cycle progresses, climate change and wildfires both increase frequently and seriously. Forest fires are also developing at higher frequencies as a result of global warming. Firefighters use techniques like back-burning to help prevent further spread of these fires, but these measures are not always effective.Some factors that promote wildfires, such as drought and insect outbreaks, have been linked to global warming as well. Insects that kill trees and other plants make the remains more sensitive to fires, as the plant matter dries out and can more easily be burned. Higher temperatures that result from climate change cause more water to evaporate(蒸发)from reservoirs and lakes, which can lead to drought.With global warming causing higher temperatures, the wildfire seasons of affected areas lengthen. This occurs because summer heat begins to build earlier in the year, and the cooling fall season is delayed. For forests in the southwest United States, the conclusion of snows melting indicates the time when fires are able to start. Climate change has caused the melting of snow to occur earlier than it did 50 years ago by about one to four weeks.The global warming trend has hit Southern California extremely hard, and the months of January through April have been hotter this year than they have been for any others in recorded history. This has also caused a drought which has been severe or worse for the entire state. Last year, drought affected only 46 percent of California.With the results from these recent studies, global warming has been linked to an environment that promotes wildfires, by creating higher temperatures and causing drought. Californias wildfire season is just starting, and the damages are likely to be worse as the season continues.1. What does the author intend to tell in the passage?A. Global warming causes high temperatures and wildfires.B. Forest fires have been bringing serious threat to the earth.C. High temperatures make water disappear at a high speed.D. California and Arizona are faced with the extreme weather.2. Why are insects connected with wildfire?A. Because tons of insects exist in the forests.B. Because drought drives insets into the forests.C. Because insects leave the trees dead and dry.D. Because the bodies of insects can burn easily.3. We can conclude from the passage that .A. it is impossible to prevent wildfire from happeningB. the southern states in the USA will see the longest summerC. it is necessary to raise awareness of fire preventionD. California has done nothing to fight wildfiresBFred and Bonnie have 21 children. First they had two of their own and they adopted 19 others from countries around the world. They adopted children from many countries, like Japan, India and Vietnam. Each time they made sure they had music, food, pictures, and books of the childs native country so the children would feel good about themselves.Fred and Bonnie had pre-school children running around the house for 26 years without a break! The washer was always going and clothes hung from one end of the room to the other. Everyone helped out with the housework. The family drank ten litres of milk a day.The couple enjoyed their children. They took care of small problems right away so they wouldnt become big problems. Fred says, If you have trouble with one of your children, dont worry. Worry doesnt help, and in time your child will be all right.When the children were older, Bonnie began travelling to India. She opened three homes for 170 homeless children. She travels there four times a year to bring food, medicine, and used clothing to the needy children.Back home, Bonnie cooks meals for her seven children still living there. The other children keep in touch. When Tran got married,18 brothers and sisters danced at his wedding.They hope their children will find their own way to help others. They want them to be happy, healthy and independent.Fred says, Let me light my lamp and never wonder if it will take away the darkness.4. What does the word adopted underlined in Paragraph 1 mean ?A. raised children with government support.B. looked after children for parents who were busy.C. provided education for children from poor families.D. brought up someone elses child as his parents.5. What did the couple do to make sure that the children felt good about themselves?A. To offer them things from their own country.B. To feed them well.C. To make