题目内容：

    With only about 1,800 pandas left in the world, China is desperately trying to clone the animal and save the endangered species (物种). That’s a move similar to what a Texas A&M University researcher has been undertaking for the past five years in a project called “Noah’s Ark”. Noah’s Ark is aimed at collecting eggs, embryos (胚胎), semen and DNA of endangered animals and storing them in liquid nitrogen. If certain species should become extinct, Dr. Duane Kraemer, a professor in Texas A&M University Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future.

It is estimated that as many as 2,000 species of mammals, birds and reptiles will become extinct in over 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years. This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal.

The entire procedure could take three to five years to complete.

“The nuclear transfer of one species to another is not easy, and the lack of available panda eggs could be a major problem,” Kraemer, who is one of the leaders of the Project at Texas A&M, the first­ever attempt at cloning a dog, believes. “They will probably have to do several hundred transfers to result in one pregnancy (怀孕). It takes a long time and it’s difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort,” adds Kraemer.

“They are trying to do something that’s never been done, and this is very similar to our work in Noah’s Ark. We’re both trying to save animals that face extinction. I certainly appreciate their effort and there’s a lot we can learn from what they are attempting to do. It’s a research that is very much needed.”

1.The aim of “Noah’s Ark” project is to ________.

A.make efforts to clone the endangered pandas

B.transfer the nuclear of one animal to another

C.collect DNA of endangered animals to study

D.save endangered animals from dying out

2.The underlined word “groundbreaking” can be interpreted as ________.

A.especially new B.pioneering

C.damaging D.trouble­making

3.What may be the best title for the passage?

A.China’s Success in Panda Cloning

B.The First Cloned Panda in the World

C.Exploring the Possibility of Cloning Pandas

D.China — the Native Place of Pandas Forever

4.From the passage we know that ________.

A.about two thousand species will probably die out in a century

B.scientists try to implant a panda’s egg into a rabbit

C.Kraemer will work with Chinese scientists in clone researches

D.Kraemer and his team have succeeded in cloning a dog