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Toads are Arthritis and in Pain
参考答案：46-50：E B C A F
A. Toads are not built to be road runners—— they are built to sit around ponds and wet areas.
B. The task now facing the country is how to remove the toads.
C. Furthermore, they soon take over the natural habitats of Australia’s native species.
D. Toads with longer legs move faster and travel longer distances while the others are being left behind.
E. But this advantage also has a big drawback—— up to 10% of the biggest toads suffer from arthritis.
F. But arthritis didn’t slow down toads outside the laboratory the research found