1. (2022高三下·定远月考) 阅读理解

Watching his father die without oxygen support while suffering from a heart attack in 2020, Taher Mahmud Tarif, a Bangladeahi boy, made up his mind to build a device to prevent any more such tragic deaths. Afterwards, many COVID-19 patients experienced low oxygen levels in their blood, with demand for oxygen concentrators (浓缩器) among other medical equipment shooting up during the recent sharp rise in cases. Tarif said the situation gave him more driving force to build the device.

With the financial and overall support of Ishwardi UNO office and his educational institution, Tarif's determination and tireless efforts were rewarded with success as the ninth grader of Ishwardi Sara Marwari High School managed to make the concentrator after trying five times for about seven months, mainly using domestic components. He said that a locally made oxygen eoncentrator like his costs approximately $ 760 whereas an imported one does over $2,600.

In June, Tarif gave a detailed account of his invention and manufacture at the UNO office in Ishwardi at 11:00 am on Tuesday. He said it was created from his own thinking and with the addition of local technology generators and electric components. An oxygen concentrator takes in air and removes nitrogen (氮气) from it, leaving oxygen-enriched gas for use by people needing medical oxygen. "About 90 percent oxygen concentration can be generated from my oxygen concentrator machine. This machine can provide high-flow oxygen supply too. It can be very handy in local areas with no scope of getting oxygen support,"Tarif added.

"This is obviously a good invention for oxygen generation. It is capable of producing high-flow oxygen so it can be used for patients or refilling oxygen bottles," said an assistant professor of Pabna Medical College Hospital. "Despite more lab and other examinations before using the machine as medical equipment," the UNO said, "Tarif's invention will probably be a great achievement during this alarming COVID-19 situation."

1. （1） Why did Tarif build an oxygen concentrator?

   A . Because his father needed one. B . Because his father died of COVID-19. C . Because COVID-19 patients need oxygen. D . Because he wants to help save other patients.
3. （2） What can we know about Tarif's invention in Paragraph 2?

   A . It mostly consists of local parts. B . It succeeded at the first attempt C . It was made without others' help. D . It costs more than 2.600 dollars.
5. （3） What can we infer from the last paragraph?

   A . Tarif's invention has not been tested yet. B . Tarif's invention has a promising future. C . Tarif's invention produces oxygen botles. D . Tarif 's invention has proved useful for COVID-19.
7. （4） Where is this text most likely from?

   A . A diary. B . A brochure. C . A newspaper. D . A novel.