阅读理解Le Le and Ya Ya have arrived at the Memphis Zoo this week. The number of giant pandas in the United States has increased to nine. They spread across four zoos. It’s not easy getting them here. In order to bring a pair of pandas into the United States, each zoo has to get a permit(许可证), because the panda is the type of animal that may soon disappear from the world. “Pandas are difficult to study in the wild. They live in mountains. They are shy, so it’s rare that you would actually see one.” What the western scientists know about pandas today mostly comes from studies of Ling Ling and Hsing Hsing at the Smithsonian Institution’s National Zoo. Ling Ling and Hsing Hsing were the first two pandas in the U.S. zoo. They were given as a gift to the United States in 1972 by the Chinese government. The nine pandas now in the U.S. belong to the Chinese government, and are in the American zoos for 10 to 12 years. A baby panda which was born at the San Diego zoo three years ago also belongs to China. Studies on pandas can improve their conditions. They provide knowledge that helps save the wild population. 1. How many giant pandas were there in the U.S. zoos before Le Le and Ya Ya arrived? A. 9 B. 3 C. 6 D. 7 2. What does a zoo need before it gets a panda from China? A. Bamboo trees B. An airplane. C. A permit. D. Scientists. 3. To which of the following do the pandas belong? A. The Chinese government. B. The U.S. zoos. C. The U.S. Government. D. The Chinese zoos. 4. Why do scientists study pandas? A. To improve their conditions. B. To limit their population. C. To send them as gifts to foreign countries. D. To help pandas live in the nature. 5. Why don’t scientists study pandas in the wild? A. Because it is dangerous to study them in the wild. B. Because it is difficult to actually see them in the wild. C. Because it is easier to study them in the zoo. ` D. Because it is not allowed to study them in the wild. 6. Which of the following is true according to the passage? A. All the pandas in the U.S. stay in one zoo. B. Le Le and Ya Ya were the first two pandas in the U.S. zoo. C. The first pandas arrived in United States in 1972. D. The baby panda born at the San Diego zoo belongs to the U.S..