C. It was created in the middle of 1960s.

　　D. It tells something about people's life in a town.

　　5. As for the painting by Thomas Chambers, the author didn't ________.

　　A. know where it was created

　　B. think it would be valuable

　　C. think it was suitable for him/her

　　D. know what its meaning was

　　6. How did the author most probably feel about the painting Alligator Fisher?

　　A. Calm.　　　　　　　　B. Scared.

　　C. Surprised. D. Unhappy.

　　7. What was the problem with A Letter from My Mother?

　　A. It cost too much.

　　B. It was upsetting.

　　C. It wasn't well painted.

　　D. It was too large.

　　C

　　This afternoon, when my cousin Lisa read on a site that scientists are trying to clone the woolly mammoth (猛犸象), she became very excited.It seemed that she couldn't wait to see a living woolly mammoth.I don't think my cousin is alone.Many people, especially young kids, look forward to seeing a living animal that lived on the earth over 10,000 years ago.But I think quite differently.

　　Bringing back the woolly mammoth through cloning is unfair to other animals.Dolly, the famous cloned sheep, was the only successful one in 237 eggs.Three lambs were created, but only one survived.Dolly suffered from severe arthritis (关节炎) and lung disease because of genetic mutations (基因突变). She had to be put to death at the young age of 6.If that's what it takes to produce a sheep, how many elephants would have to suffer and die in hopes of producing a mammoth？And how many failed mammoth babies would there be?

　　Why do we waste valuable time and money bringing back extinct animals when we need to save the ones that are still with us but are at high risk of dying out？For example, Asian and African elephants will be lost by 2020.They are those that truly need our attention.

We haven't even managed to return endangered animals at zoos to existing natural habitats in the wild.Keeping animals at zoos has had a little positive impact on the status of most endangered species.Of the many endangered and at­risk animals kept at zoos, only a few species have been