I'm taking a test and have to guess the right answer to the question after the article. Article: Goats are amazing animals. They can survive just about anywhere. Altogether there are nine species of goats in the world. Goats have more uses than you could ever imagine. Goat's meat can be eaten and goat's milk is becoming popular as a healthy choice to drink milk. Goat's milk is easier to take in than cow's milk and it is called universal milk as it can be used to bottle-feed most animals. In nutrition, it is also good. Goat's skins are still used today to make gloves and other items of clothing. The initial reasons for domesticating goats were to get goat's hair, meat and milk. Goat's skins were used up until the Middle Ages for making bottles to hold water and wine for people who were traveling or camping. Just like sheep, goats are considered to be the first domesticated animal. The domestication process began over 10,000 years ago in a North Iranian town. A lot of people keep goats as pets nowadays. Goats are easily trained and you can teach them to pull carts and walk on ropes. Goats are also known for escaping their pens . If you have unsecured fencing, your goats will be interested in it and test it out and soon you will know where the openings are. Goats are also widely known for their ability to climb trees, although the tree generally has to be at a slight angle . If goats are raised correctly and trained from an early age, they never develop any bad habits. Goats will attack each other. However, if they're corrected from an early age they never attack humans or other animals. Question: Why is goat's milk called universal milk? Options: A: It is rich in nutrition and easy to take in. B: It is good for our health. C: It is suitable to feed most animals. D: It is easy to get.
C

I'm taking a test and have to guess the right answer to the question after the article. Article: Dae Jon is the city in South Korea, where I was born and grew up. There was a public park there. It was a very popular place, and I have tons of precious memories from times spent there. Our teachers often took us to that park for a spring or fall picnic. When I learned martial arts --Tae Kwon Do, my master usually took us there to train us. There was a hill there which was not high, so I could reach the peak within forty minutes even though I was very young. From the peak, I could see a lot of places if it was a sunny day. There was a huge rock on the top called Eagle Rock because the shape of the rock looked like the head of an eagle. We spent lots of fun days there. We played hide-and-seek within the limited area, and we sometimes caught frogs and fish in the pond. When we felt thirsty, we enjoyed drinking cold spring water. When I was a ten-year-old boy, I usually went to the park with my father to exercise early in the morning. It was quite dark, so I sometimes felt afraid, but after I got used to going there, I enjoyed breathing the fresh air and hearing the birds sing. Recently, I went back to the park to remember my good times there. When I arrived at the entrance, I was surprised because it didn't seem to be the same as I remembered it. Everything has changed in the thirteen years since I last saw it, but the good memories soon came back. I could almost imagine a boy playing there with a slight smile and shaking hands with me. Question: The writer was surprised when he got to the park because _ . Options: A: the park had changed a lot B: his good memories didn't come back C: he didn't see the boy with a slight smile D: he couldn't breathe the fresh air as usual
A

I'm taking a test and have to guess the right answer to the question after the article. Article: Medical drugs sometimes cause more damage than they cure. One solution to this problem is to put the drugs inside a capsule, protecting them from the body--and the body from them--until they can be released at just the right spot. There are lots of ways to trigger this release, including changing temperature, acidity, and so on. But triggers can come with their own risks--burns, for example. Now, researchers in California have designed what could be a harmless trigger to date: shining near-infrared light (NIR, ) on the drug in the capsule. The idea of using light to liberate the drug in the capsule isn't new. Researchers around the globe have developed polymers and other materials that begin to break down when they absorb either ultraviolet (UV, ) or visible light. But tissues also readily absorb UV and visible light, which means the drug release can be triggered only near the skin, where the light can reach the capsule. NIR light largely passes through tissues, so researchers have tried to use it as a trigger. But few compounds absorb NIR well and go through chemical changes. That changed last year when Adah Almutairi, a chemist at the University of California, San Diego, reported that she and her colleagues had designed a polymer that breaks down when it absorbs NIR light. Their polymer used a commercially available NIR-absorbing group called o-nitrobenzyl (ONB). When they catch the light, ONB groups fall off the polymer, leading to its breakdown. But ONB is only a so-so NIR absorber, and it could be poisonous to cells when it separates from the polymer. So Almutairi and her colleagues reported creating a new material for capsules that's even better.This one consists of a long chain of compounds called cresol groups linked in a polymer. Cresol contains reactive components that make it highly unstable in its polymeric form, a feature Almutairi and her colleagues use to their advantage. After polymerizing the cresols, they cap each reactive component with a light-absorbing compound called Bhc. When the... Question: Why is ONB unsatisfactory? Options: A: It breaks down when it absorbs NIR light. B: It falls off the polymer and triggers drug release. C: It has not come onto the market up till now. D: It is not effective enough and could be poisonous.
D