22.解析：细节理解题。根据Ameenah Gurib－Fakim中She is a scientist who has spent many hours researching the local plants of Mauritius and their values as medicine.可知Ameenah Gurib－Fakim花费大量时间研究植物是为了研究植物的药用价值，故选C。

23．It can be inferred that when Mae C．Jemison was young，she__A__ .

A．showed great interest in space

B．was encouraged by an astronaut

C．failed to receive a good education

D．wanted to become the first astronaut

解析：细节理解题。根据Mae C．Jemison中As a child，Jemison spent a lot of time in her school library ，reading especially books space.可知Jemison小时候就喜欢有关太空的书籍，对太空感兴趣。故选A。

B

Audrey Hepburn (奥黛丽•赫本)won an Academy Award as Best Actress for her first major American movie，Roman Holiday，which was released in 1953.But she is remembered as much for her aid work as for her acting.

Born in Belgium in 1929，Audrey's father was British and her mother was Dutch. Audrey was sent to live at a British school for part of her childhood. During World War Ⅱ，she lived and studied in the Netherlands. Her mother thought it would be safe from German attacks. Audrey studied dance as a teenager and during college. But when she returned to London after the war she realized she wasn't going to be a ballerina (芭蕾舞女演员).So she began taking acting parts in stage shows. Later she began to get small parts in movies.

But it was Audrey Hepburn's move to America in 1950s that brought her true fame. In 1951 she played the character "Gigi" in the Broadway play of the same name and received great critical praise. Two years later，Roman Holiday made her a star at the age of 24.

Audrey made more than 25 movies. Among her roles，the most popular one was Holly Golightly in Breakfast at Tiffany's in 1961.Three years later she played Eliza Doolittle in My Fair Lady.

She was married two times and had one child with each husband. In 1989，the UN Children's Fund named Audrey a goodwill ambassador. She travelled all over the world in support of UNICEF (联合国儿童基金会)projects. The UN agency said she was a tireless worker. She often gave 15 interviews a day to gain money and support for UNICEF projects.

Audrey Hepburn often said her loyalty to UNICEF was the result of her experiences as a child during World War Ⅱ. She said she knew what it was like to be starving and to be saved by international aid. She was a goodwill ambassador until her death in 1993 from colon cancer.

25．The reason why Audrey lived and studied in the Netherland was that __C__.