题目内容：

Nola (August 21, 1974 -November 22, 2015) was a northern white rhino who lived at the San Diego Zoo Safari Park near Escondido, California. At her death, she was one of only four remaining northern white rhinos in the world. The other three lived in Kenya. World Rhino Day, held on September 2, is to raise awareness(意识) of the less than 30,000 other rhinos left on Earth.

“Rhinos need our help today, not tomorrow,”Nola’s lead keeper Jane Kennedy said. “Last year we lost over 1,200 rhinos just in South Africa. If we continue to lose more than 1,000 rhinos a year, in 10 to 20 years all the rhinos on the planet will be gone.”

“Unfortunately, most animals are in danger of dying out because of humans,” Kennedy says.“ Humans have either poached animals, or because there are over seven billion of us, we’ ve taken up too much of the world’s resources ”. Poachers illegally hunt rhinos for their horns. They sell the horns for thousands of dollars per pound, to be used for art, jewelry, and decorations.Experts believe that one rhino is poached every eight hours.

In 1975, the San Diego Zoo Institute for Conservation Research started the Frozen Zoo, a program through which researchers have collected cell (细胞) samples from more than 8,000 different types of animals, including the northern white rhino. Scientists hope that by studying the rhino cells, they will get greater understanding of it, and will find ways to increase its numbers.

Jane Kennedy describes World Rhino Day as “a celebration of rhinos along with an awareness campaign for everybody across the world to know that rhinos need our help.”At the San Diego Zoo, children and adults are welcome to visit and speak with zookeepers to learn about rhinos. But you don’ t have to live in San Diego to celebrate World Rhino Day. It is observed around the world, with zoos and wildlife parks holding special events and programs to teach people about rhinos, and enable them to see the animals up close. For more information, go to www.worldrhinoday.org.

1.What do we know about Nola?

A. It was a baby white rhino.

B. It was one of the last of its kind.

C. It lived with other northern white rhinos in Kenya.

D. It died on September 22 at the San Diego Zoo Safari Park.

2.What troubled Jane Kennedy according to Paragraph 2?

A. The rhinos’ uncertain future.    B. The rhinos’ strange activities.

C. The limited natural resources.    D. The rare animals in South Africa.

3.What does the Frozen Zoo aim to do?

A. Invent new kinds of animals.    B. Keep animals from dying out.

C. Prevent rhinos from being hunted.    D. Raise public awareness of rhinos.

4.What is the main purpose of the last paragraph?

A. To help people know more about animals.    B. To encourage people to protect rhinos.

C. To report special events in San Diego.    D. To introduce World Rhino Day.