1. (2023七下·佛山竞赛) 阅读理解

According to the non-profit organization (非营利组织) Food Allergy Research and Education, These foods cause (造成) 90 percent of all food allergies :cow milk. eggs, peanuts, fish , shellfish, tree nuts, wheat, soy. Itching (痒) vomiting (呕吐) and stomachaches (腹痛)...food allergies (过敏) can be dangerous. People can even die (死亡) from them. What's worse, they are becoming more common (常见的) these days. Kari Nadeau, an allergy expert (专家) at Stanford University in the US,did a study of food allergies worldwide.She found that while 3 percent of people had them in 1960, the number rose to 7 percent in 2018. Nadeau said that one reason for this might be that we are exposed (暴露) to fewer microbiota (微生物群). Microbiota can "train"our bodies and stop us from getting allergies.

Our bodies are exposed to fewer microbiota these days. We live in cleaner homes. We stay indoors (室内) for longer hours. We are given more antibiotics (抗生素)as children - antibiotics kill microbiota.Scientists say it's a good idea for babies to eat many different kinds of foods so that they can build up tolerance (耐受) in their early years. Having a pet cat or dog can also stop allergies from being developed.

1. （1） How many kinds of food cause 90% of all food allergies?

   A . 8 B . 9 C . 10 D . 11
3. （2） Which of the following can be caused by allergies?

   ①Vomiting ②Headache ③Death ④Itching

   A . ①②③ B . ②③④ C . ①②④ D . ①③④
5. （3） What did Nadesu find?

   A . More people have allergies these days. B . There are more kinds of food allergies these days. C . Fewer people have food allergies these days. D . The causes of allergies are changing.
7. （4） What can stop allergies from developing?

   A . Living in clean homes. B . Going outside more. C . Taking more antibiotics. D . Eating less food.
9. （5） What is the last paragraph mainly about?

   A . How to figure out if we have allergies. B . The best time to stop allergies. C . Who can protect us from allergies. D . How to prevent allergies.