题目内容：

    One night in December 2011, a bear came into the city of Vancouver in Canada. It walked through the streets, past houses, shops and offices until it found some food in bins outside a restaurant and started eating. In the morning, someone saw the bear and called the police. They came with a vet（兽医）from the city zoo, put the bear in a lorry and took it back to the mountains. Luckily, the bear was safe, but what happens in other countries when big animals come into cities?

Big animals usually come into cities to find food. In Cape Town, South Africa, baboons（狒狒）enter the city when they are hungry. They go into gardens and eat fruit from trees, or into houses and take food from cupboards（碗橱）and fridges. Baboons are strong animals and they can scare people. But the city can be dangerous for baboons too.

Sometimes, they are killed in traffic accidents. Human food is very bad for their teeth because it has a lot of sugar. Now, there are baboon monitors（监督员）working in Cape Town to return the animals to the countryside.

In Berlin, pigs sometimes come into the city to look for food. They eat flowers and plants from parks and gardens, and cause accidents in the streets. Some people like the pigs and they give them food and water to drink. Other people do not like the pigs and want the government and police to stop them.

In Moscow there are 35, 000 wild dogs. They live in parks, old houses, markets and train stations. Many people give them food and water. Some make small houses for the dogs in their gardens. This helps them in winter, when the temperature is-10℃ and there is a lot of snow and ice.

In some cities, you can see birds, insects, mice and squirrels every day. But sometimes, it is dangerous when big animals come from the countryside to find food. We need some good ideas to stop animals coming into the city without hurting them.

1.Why do big animals go into cities, according to the article?

A.Because they are hungry. B.Because they are homeless.

C.Because they are lost. D.Because they like being with humans.

2.Why should we stop animals from entering cities?

A.Because they often kill people in the streets.

B.Because they eat too much food in people's gardens.

C.Because they may harm other animals in the city.

D.Because they may cause trouble and endanger people's lives.

3.Which of the following is TRUE about the big animals which come into cities?

A.Bears in Vancouver are kept in the city zoo. B.Baboons are taken back to the wild.

C.Pigs are always well treated in Berlin. D.Wild dogs cause many problems in Moscow.

4.What's the article mainly about?

A.Problems caused by big animals in cities. B.Living alongside wild animals in cities.

C.How wild animals are treated in different cities. D.How to keep big animals away from cities.