their jumps. Aquatic frogs, meanwhile, jumped very long distances but remained close to the ground. On the other hand, the jumps of burrowing frogs were low both in height and distance. The scientists used high speed video cameras to film the jumps of approximately 230 wild frogs, from 30 different species.

"We searched actively for the frogs at night after heavy rains during their breeding season, as they are more likely to be active," Miss Vidal-Garcia said. The frogs were caught by hand and filmed in the field with two high-speed filming cameras in order to get a Three-Dimensional view of their jumps. The videos were then analyzed frame by frame by computer software and variables including height, distance and speed were measured. The results showed that frogs from different habitats adopt distinct jumping styles.

Frogs from different habitats also had distinct shapes. "Burrowing frogs have very squat(蹲) bodies and short limbs," explained Miss Vidal-Garcia. "This is because they tend to occupy arid environments so this helps to minimize water loss through their permeable(有渗透性的) skin. The aquatic frogs, however, have more streamlined bodies with longer limbs to improve swimming ability."

Miss Vidal-Garcia added "In the future, I am hoping to do more fieldwork so that I can collect data from fifty species and cover all the Australian frog clades(分化枝). I also want to investigate how the shape of the pelvis(骨盆) influences jumping style."

1. Which of the following factors is probably not linked to the jumping styles of frogs?

A. Pelvis shape. B. Species. C. Habitats. D. Skin feature.

2. Which of the following statements is true?

A. Tree dwelling frogs jump high and far.

B. Burrowing frogs jump low and far.

C. Aquatic frogs jump low and far.

D. Burrowing frogs don't jump much.

3. What can we know from the passage?

A. Frogs tend to be active before breeding season.

B. More than 230 species were filmed in the research.

C. More fieldwork may be done to know further about the jumping style.

D. Environment alone decides the jumping styles of frogs.

4. The underlined word "arid" can probably be replaced by ________.

A. dark B. dry C. wet D. bright

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