Global warming is a world problem and Monitoring (监制)it usually needs a lot of math knowledgE. But Francisco and Ruby track(追踪) what climate change is doing to five different plants in Tucson, Arizona and they are only in the second gradE. “We are collecting data because the weather is changing and the plants are blooming (开花),” Ruby explaineD. Many other students at Borton Primary Magnet School and Sunnyside High School in Tucson are going outdoors to be part of a new scientific action to figure out（计算）how the biological timing of the Earth is changing. It’s a research project that everyone, even a kindergartner, can join in. The National Phenology（生物气候学）Network is calling on volunteers to help track early spring blooms and changes in animals caused by global warming. It’s called Project Budburst. When it was first open to the public last year, thousands of people joined in . “Everyone can offer his hand by tracking the timing of flowering events or leaf-out events for plants and animals in their backyard,” said Phenology Network director Jake Weltzin. The idea is that tracking flowers blooming —— especially lilacs（丁香）which ordinary people have helped track for many years ——is simplE. The Project Budburst website gives directions on what to look for in different parts of the country. University of Maryland professor David said it was so easy to figure out what’s blooming that a lack of special knowledge wasn’t a problem. 51. What would be the best title for the text? A. Even Kids Can Help Monitor Global Warming. B. People Pay More Attention to Global Warming. C. Students Are Asked to Join Science Research Projects D. Schools Call on Students to Take on Outdoor Activities. 52. What’s the purpose (目的)of Project Budburst? A. To protect plants and animals from global warming. B. To attract more students to sciencE. C. To remind people of the results of global warming. D. To study the changing biological timing of the Earth. 53. People taking part in the project can get some information by _________. A. calling network director Jake Weltzin B. visiting the Project Budburst website C. writing to the National Phenology Network D. asking professors with phenology knowledge 54. If you join in Project Budburst, you should _____________. A. get some special training first B. do some careful observation（观察）outdoors C. keep some plants or animals in your backyard D. invite some other volunteers to work with you 55. The example of Francisco and Ruby is used to show that_________. A. it is quite natural to do scientific research B. more kids are hoping to be scientists in the future C. primary schools are focusing on science education D. the new project is very simple and even kids can join in it