Some people see oysters (牡蛎) as delicious food. But some raise oysters to clean up the polluted seawater. Amy, a 15-year-old girl, is one of them. She has won a master oyster gardener prize this year. She thinks oysters are really helpful. They are environmental stars.

“I knew nothing about oyster gardening when I started in 2022. I learned all of this after I completed a free course about it. The course is about raising oysters in cages (笼子),” Amy says.

There used to be lots of oysters in coastal waters. But their numbers have diminished. This is mainly because of some natural disasters. Oyster gardening is a way to help. “Anyone can join,” an oyster gardening researcher Liz Black says.

“You don’t have to do a lot to take care of your oysters, but the influence they have on the environment is huge,” Amy says.

During the oyster gardening season, Amy and her mom go to the beach. There Amy has nine cages. “Once a week I go out there,” she says. She pulls the cages from the water to check conditions of the oysters.

This spring, Amy’s oysters will be big enough to be collected. Amy will go with Liz to pick them up. Oysters that are collected will then be “planted” on the reefs (珊瑚礁). So far, Amy has raised more than 1,500 oysters. She’s a great leader of oyster gardening and a great supporter, too.

1.1．What does Amy think of oysters?

A Huge.

B Clean.

C Helpful.

D Delicious.

解析：选C。C.细节理解题。根据第一段 “She thinks oysters are really helpful.” 可知，艾米认为牡蛎非常有帮助，答案选 C。

2.2．When did Amy get to know about raising oysters?

A After she joined a research team.

B After she won a competition.

C After she attended a free course.

D After she cleaned up the seawater.

解析：选C。C.细节理解题。由第二段 “I knew nothing about oyster gardening when I started in 2022. I learned all of this after I completed a free course about it.” 可知，艾米是在完成了一门关于牡蛎养殖的免费课程后才了解到相关知识的，答案选 C。

3.3．What does the underlined word “diminished” in paragraph 3 probably mean?

A Grown.

B Fallen.

C Disappeared.

D Remained.

解析：选B。B.词义猜测题。根据第三段 “There used to be lots of oysters in coastal waters. But their numbers have diminished. This is mainly because of some natural disasters.” 可知，过去沿海水域有很多牡蛎，但是由于一些自然灾害，它们的数量应该是减少了。“diminished” 意思是 “减少”，与 “fallen” 意思相近，答案选 B。

4.4．Why does Amy pull the cages out of water weekly?

A To feed the oysters.

B To mix the oysters.

C To check the oysters.

D To name the oysters.

解析：选C。C.细节理解题。根据第五段 “She pulls the cages from the water to check conditions of the oysters.” 可知，艾米每周把笼子从水里拉出来是为了检查牡蛎的情况，答案选 C。

5.5．What is the best title for the text?

A A Cage Maker

B A Master Prize

C An Oyster Festival

D An Oyster Gardener

解析：选D。D.主旨大意题。文章主要讲述了 15 岁的女孩艾米养殖牡蛎，为净化海水做贡献的事情，她是一位牡蛎养殖者，“An Oyster Gardener” 作为标题最合适，答案选 D。