题目内容：

The scar ran down her leg from the knee to the ankle. She brushed her fingertips over its surface, remembering.

Jerry was only seven when he started surfing; by the age of eleven, he was positively incredible, moving over the face of big waves like there wasn’t even a slightest bit of efforts involved in.

On that day in Bah, though, the ocean had seemed strange. The waves broke like water in a washing machine, and the breaks had been heavy too, making it tough to tell whether it was better to try to catch one or to get out of its way. That was how he’d misjudged.

Ella had seen her brother lose control, his board was thrown out of the water riderless high into the air, but she hadn’t seen him surface. She’d waited for the space of a breath. Nothing. Something, clearly, was wrong.

She dashed into the water, swimming faster even than the competitions at school. Lung burning. Heart Piping-Focused.

She’d found him floating just beyond the reef (暗礁), face up but knocked out cold. Just as she was paddling the water hard, her leg was hurt by the reef, a short, sharp instant of pain.

No matter. She had kept Jerry5s head above water, swimming all the way back to shore. That day had been the worst, scariest moment in Jerry’s surfing career, which has seen him rise from a no-name kid who loved the ocean to a young star, winning competitions around the world.

For Ella, her life had changed as well. She had learned something about who she was, about what she could achieve. She ran her fingers again over the scar, the physical map of the person she had become.

1.Why did Ella think something was wrong?

A. She didn’t see Jerry come out of water.

B. She had not seen Jerry lose control before.

C. She saw Jerry’s board high into the air.

D. She noticed Jerry held his breath longer.

2.What does the underlined part “positively incredible” probably mean?

A. Terribly excited.    B. Extremely good.

C. Relatively young.    D. Hardly talented.

3.For Ella, the scar represents       .

A. her skill at saving lives    B. her discovery of self-value

C. her envy of her brother    D. her love for swimming career

4.What can be inferred from the text?

A. Ella was as outstanding an athlete as Jerry.

B. Jerry learned how to surf all by himself.

C. Ella was grateful for this terrible experience.

D. Jerry had his leg injured in the surfing accident.