五、跨学科阅读理解。
Every summer, about three billion birds migrate(迁徙) from North Africa to Europe and Asia. In winter, they return to North Africa. As they travel from one place to another, they use the sun, stars, smells and landforms(地形) to find the way.
The migration is long and difficult, and some of the birds die during each trip. However, it is not this twice-a-year journey that 
poses the greatest risk to these birds. The main danger to the birds comes from hunters all over the Mediterranean(地中海地区), where lots of migratory birds are killed every year. As a result, the bird population is falling.
In countries along the Mediterranean, many migratory birds are illegally(非法地) trapped or killed. Besides traps, hunters also use electronic calls to catch birds. They make bird sounds to attract the real birds. Some hunters also use nets to catch birds as they fly close to the sea. “There are no birds,” said one local man. “We walk for hours without seeing any. It's really scary.”
Birds are in danger, and many countries are working to solve this problem. In the European Union, hunting migratory birds is illegal in some countries, while in others, it is strictly controlled—the birds can only be hunted at a certain time of year. What's more, many nature-protection groups are making sure that laws are obeyed. This has been successful in many places. For example, Sicily, an island of Italy, was once a place where illegal bird hunting was common. Today, it has mostly eliminated(消除) bird hunting, and as a result, birdwatching is becoming popular there.
Wildlife organizations around the Mediterranean are helping to bring about change. “Hunting bans(禁令) are working,” said Martin Schneider-Jacoby, a bird scientist. “But there is still more to do. We hope to stop hunting and protect birds' living areas all over the Mediterranean. If this can be done, the number of birds will increase. There's a long way to go, but there is hope.”
(
C
)1. The underlined word “poses” probably means “______” in Paragraph 2.
A. connects
B. compares
C. causes
D. cures
(
B
)2. What are mentioned as tools for trapping and killing birds?
①Traps. ②Guns. ③Nets. ④Electronic calls.
A. ①②③
B. ①③④
C. ①②④
D. ②③④
(
A
)3. What change has taken place in Sicily?
A. Bird hunting is hardly seen in Sicily.
B. Some rare birds can be seen in Sicily.
C. Hunters try to attract more birds to the area.
D. The weather has become more pleasant in the area.
(
D
)4. The passage is mainly about ______.
A. several problems caused by migratory birds
B. why migratory birds are hunted in the world
C. how tourism causes a drop in the migratory bird population
D. the situation of migratory birds and the efforts to protect them