题目内容：

    As doctors and nurses struggle for medical supplies to fight the coronavirus pandemic, help is coming from an unlikely place – high school students.

The Career Technical Education Charter (CTEC) High School, US, has been utilizing (利用) its nine 3D printers to make face shields (防护面罩) for healthcare workers on the frontline.

Face masks have been particularly challenging to find across the US since the outbreak. Gavin Newsom, Governor of the State of California, announced recently that the state is set to spend $1 billion (about 7 billion yuan) to purchase 200 million masks each month to boost its supply.

Valerie Castro, 16, a CTEC sophomore, is part of a team of teachers and students who came up with design tweaks (改进) that cut almost 30 minutes off the time it takes to build a face shield.

“That’s what makes this school kind of different,” she said. “Even though all these bad things are happening, we’re able to make an impact positively. It’s like leaving your little mark on the world.”

Makerbot, a New York-based company that makes 3D printers, has also helped CTEC to maximize the building process.

They’ve been churning out (大量生产) nearly 100 shields each day, and that production rate is set to triple as 20 more 3D printers come online at the school.

CTEC staff and students have provided masks to hospitals, dentists, urgent care centers and retirement homes in Fresno County and the surrounding areas in California.

“I was shocked,” Stacy Vohra told school staff in a video. “We were so thrilled to have the donation from CTEC. This is something that we’ve been needing.”

The entire staff has switched from daily teaching to face shield production, said Jonathan Delano, director of CTEC.

When the new 3D printers arrive, some of them will go to students’ houses so kids can help with the hands-on process, Delano said.

“That’s how we get through these things,” Delano said. “Our high school focuses on giving back to the community. Students should know the skills they hold can have an impact on a community.”

1.What sets The Career Technical Education Charter High School apart, according to Castro?

A.They joined healthcare workers on the frontline.

B.They donated about 200 million masks in a month.

C.They designed a more protective face shield.

D.They made a difference in such difficult times.

2.According to Paragraph 7, what will happen when they triple their production rate?

A.They will get 20 more 3D printers from Makerbot.

B.They will produce a face shield in less than 30 minutes.

C.They will be able to produce about 300 face shields every day.

D.They will start to sell their face shields on their school’s website.

3.What does Delano think of CTEC’s face shield production?

A.It has boosted the supply of masks in Los Angeles.

B.It has interrupted the school’s daily teaching.

C.It reminds the students of the value of their skills.

D.It challenges students to handle 3D printers by themselves.

4.What is the text mainly about?

A.Teenagers helping design and produce face masks.

B.3D printing technology being used to produce face masks.

C.Donations from high schools to fight the pandemic.

D.A high school making contributions by producing face shields.