user: Ques: Read the following article and select the best answer. 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: According to the passage, which of the following could be the best trigger? - Temperature change. - NIR light. - Acidity change. - UV light.
Ans: NIR light.

Ques: Read the following article and select the best answer. Article: Those accustomed to browsing through thousands of books in large bookstores may find Japan's Morioka Shoten a little strange. That's because this tiny bookstore that is located in Ginza, Tokyo sells only a single book at a time. Opened in May 2015, Morioka Shoten is the brainchild of Yoshiyuki Morioka. He began his career as a bookstore clerk in Tokyo's Kanda district before branching out to open his own store. It was here while organizing book reading and signing that he realized that customers usually came into the store with one title in mind. Morioka began to wonder if a store could exist by selling multiple copies of just one single book. In November 2014, he partnered with Masamichi Toyama to establish a unique bookstore with the philosophy of "A Single Room with a Single Book". The selections that are picked by Morioka change weekly and vary widely to attract customers with different interests. Recent choices include The True Deceiver, an award-winning Swedish novel by Tove Jansson, Hans Andersen's Fairy Tales, and a collection of Karl Blossfeldt's photography of plants. Morioka has also selected books written by a famous Japanese author Mimei Ogawa. To highlight his only offering, Morioka often uses clever tricks. For example, when selling a book about flowers, the storekeeper decorated his shop with the ones that had been mentioned in the book. He also encourages authors to hold talks and discussions so they can connect with customers. Morioka says his goal is for the customers to experience being inside a book, not just a bookstore. Risky as the idea might seem, things appear to be going well. The storekeeper says he has sold over 2,100 books. Things can get better given that his bookstore is becoming increasingly popular not just among the locals but also visitors form other countries. Question: Why does Morioka encourage authors to hold talks? - To introduce his bookstore. - To advocate his philosophy. - To make books better understood. - To help readers make more friends.
Ans: To help readers make more friends.

Ques: Read the following article and select the best answer. Article: Australian cities can keep their native wildlife -- but only if they can kick their habit of urban sprawl  . That's the finding of a new study by leading Australian environmental researchers Jessica Sushinsky, Professor Hugh Possingham and Dr Richard Fuller of The University of Queensland. "While urban development usually reduces the number of birds in a city, building more compact   cities and avoiding urban sprawl can slow these reductions greatly," says lead author Jessica Sushinsky. "Compact housing development leaves birds' homes untouched, leading to fewer losses of birds." The researchers surveyed native and wild birds in Brisbane's urban areas, including living and industrial areas, public parks and gardens, major roadways and airports. They then used statistical modeling to find out what will happen to the birds as the city grows. The first setting was compact growth -- where multiple homes are built on land that previously had only one house. The second setting was sprawling growth -- a familiar pattern where homes are built here and there beyond the city's current boundaries.  The team's forecasts showed that a much greater diversity of species was lost over 20 years in the sprawling setting compared to the more compact setting. "Urban sprawl resulted in the disappearance of many urban-sensitive birds -- birds that only live in areas where there is native vegetation  , such as parklands and woodlands," Ms Sushinsky says.  "On the other hand, we found the city with the compact development attracted more birds because it kept more of its parks and green areas." Now the Queensland Government has adopted the more compact urban growth strategy, which, Dr Richard Fuller says, is good news for Australia's native birds. These birds are environmental specialists -- they need a particular environment to do well. "While compact development means smaller backyards, it can also make our entire cities more biodiverse," according to Dr Fuller. "The study shows that we should hold on to our green spaces instead of... Question: What can we learn about the study from the passage? - It is based on the statistics in the past. - It is strongly against urban development. - It criticizes the city environment in Brisbane. - It suggests leaving more green spaces for birds.
Ans:

assistant: It suggests leaving more green spaces for birds.