Kelydra Welcker has always loved the Ohio River, which flows by her hometown, Parkersburg. With a father who is a chemist and a mother who is a biologist, it seemed natural for Kelydra to learn how the world worked by doing scientific experiments.

At the age of six, Kelydra joined the Ohio River Cleanup campaign and came to realize how polluted the river was, which led her to set up her own lab later and study the chemicals in the river water. Kelydra was 15 when news broke about a chemical called C8, also known as APFO, in her town’s water supply that might cause cancer. She wondered what she could do to help.

Through repeated experiments, Kelydra created an inexpensive, reliable test for people in her town to measure the amount of APFO in water that they use at home. However, she didn’t just want to measure the problem—she wanted to solve it, so she continued to work on a way to remove APFO from the water.

Kelydra finally succeeded by using a device called an electrolytic cell (电解池), consisting of a dry cell battery and two electrodes (电极). Where did Kelydra get the high-quality electrodes for her experiment? They were her dad’s car wipers—minus the rubber attachments! Electrically charged, one of the electrodes became a stick that attracted the APFO in the polluted water. Then, Kelydra removed the stick and washed it off.

Using her invention, Kelydra developed a system people could use to treat their household drinking water. The system is being used by people in her community, and she hopes that it will be used more widely.

Kelydra went to college to study chemistry. “I hope to expand my horizons. I’m now looking at another chemical that may cause health problems.” She adds, “Technology helped create our problems and technology can help solve them. I want to be part of that effort.”

【小题1】What can we learn about Kelydra from the first two paragraphs?

A．She had a scientific mind.	B．She enjoyed exploring nature.
C．She followed her parents’ path.	D．She wanted to practice medicine.

【小题2】Which of the following best describes Kelydra after creating a water test?

A．Content.

B．Determined.

C．Grateful.

D．Relieved.

【小题3】What is the author’s purpose in mentioning car wipers?

A．To show the practical challenge.	B．To question Kelydra’s invention.
C．To illustrate Kelydra’s creativity.	D．To explain the chemical principles.

【小题4】What does Kelydra expect to do in the future?

A．Teach chemistry in school.	B．Create new water treatments.
C．Promote the application of chemicals.	D．Address health issues through technology.