题目内容：

Almost 80% of the Americans have stated their opposition to cloning pet animals such as cats and dogs, yet companies still try to make a business out of selling cloned pets. Pet cloning has been promoted as a way to “bring back” or “copy” a beloved companion animal. However, studies have shown that cloning remains an experimental technology with many failures.

Behind each lovely picture of a cloned cat or dog lie hundreds of animals that were kept in lab cages, receiving bad treatment to produce just that one cloned animal. For all that, you end up with a cloned animal who is unlikely to appear like the original physically or behaviorally and may experience serious health problems. Also, while pet cloning companies are charging customers up to $150,000 for a cloned pet, millions of homeless animals of the same species are available in US animal shelters for around $100. Unfortunately, most of these animals are killed for lack of adopting homes.

With No Pet Cloning campaign, the American Anti-Vivisection Society (AAVS) tries to protect both animals and people from harm. They campaigned until the US companies that sold cloned animals closed their doors. First it was Genetic Savings & Clone Inc. and then it was BioArts International.

When BioArts was closed, its owner, Lou Hawthorne, finally had to acknowledge the problems of pet cloning. According to Hawthorne, he has seen numerous failures during his pet cloning attempts, “One clone----which was supposed to be black and white----was born greenish-yellow where it should have been white (we still have no good explanation for how that happened).”

The AAVS is educating the public about the animal suffering and is seeking regulation of cloning activities. They will continue to take the lead in protecting animals from the threats of pet cloning.

1.From the passage, we know that ____.

A. pets are often deserted by their owners

B. more and more people have joined the AAVS

C. most American are against cloning pet animals

D. the American Anti-Vivisection Society is supported by the government

2.According to the passage, companies keep on selling cloned pets to ____.

A. carry on scientific studies

B. get economic interests

C. protect pet animals

D. comfort animal lovers

3.What does the author try to do by writing the second paragraph?

A. To tell the truth behind pet cloning.

B. To show the method of pet cloning.

C. To compare pet animals with homeless ones.

D. To save the animals kept in labs and shelters.

4.The underlined word “acknowledge” probably means ____.

A. accept  B. study C. admit D. manage

5.According to the passage, the AAVS devotes itself to ____.

A. getting most countries to fight against pet cloning

B. improving the technology of pet cloning

C. saving lots of animals from bad situations

D. stopping US companies’ selling cloned animals