I'm taking a test and have to guess the right answer to the question after the article. Article: Desert plants fall into two sorts according to the way they deal with the problem of surviving drought. There are the drought--avoiders--those which persist only as seeds, ready to spring up when it rains, to flower quickly and produce another crop of seeds, and to die again. There are also the drought--resisters--those which have evolved various methods for strong water, locating underground water, or reducing their need for water by such devices as shedding their leaves. The drought--resisters are perennials ,they manage to live from one rainy season to another, slowly growing bigger and bigger. Of these, the succulents is a small but interesting fraction . They may store water in their leaves, in their stems, or in underground containers. In the American deserts the best--known succulents are the cacti . They come in a wide range of sizes, from 50--foot tall giant saguaros to tiny round cacti about the size of a thumb--nail. They take thick, cylindrical or even spherical forms, thereby exposing a minimum of evaporating surface to the air and light. They are leafless, except in youth, and then the leaves are small. Typically their surfaces are spiny, discouraging thirsty animals, and channeled like an accordion , so the fleshy stem may expand quickly when the plant drinks and contract slowly as it uses up the water. The root system is widespread and shallow, with good reason; only about 3 per cent of the rain that falls on the desert penetrates to any significant depth into soil. Question: What interests the author most when he or she mentions succulents is that _ . Options: A: they take thick cylindrical or even spherical shape B: they are best--known in prefix = st1 /America C: they have many ways of containing water D: some of them can be very tiny
C

I'm taking a test and have to guess the right answer to the question after the article. Article: As I was leaving to meet Lynne,my roommate told me that I'd better take some money,but I didn't listen to him. I thought that Lynne would pay because she had invited me. I arrived at the restaurant exactly on time. I'd been told that Americans expect you to be on time. Lynne and I sat at a table in the corner of the restaurant and a waitress came and took our order. The dinner was a great success. I talked a lot about Saudi Arabia and Lynne told me all about herself. After two hours the waitress finally came and asked if we wanted one check or two. Lynne said two. We went to the cashier and Lynne paid her check. I was embarrassed when the cashier gave me my bill. I had no money to pay for my meal. Then I had an idea. I pretended to look for something in my pockets and said,"Oh!I forgot my money! Can I call my roommate,please?" The cashier showed me where the phone was and I quickly called my roommate. In a few minutes he arrived with some money,but he couldn't hide how he felt. He laughed all the way home. Now,I think it's funny too. But at the time I was terribly embarrassed. I thought that an invitation to have dinner meant the same thing in the United States as in my country. I guess you have to understand that your customs are only your customs. When you visit a foreign country,you have to learn about their customs,too. Question: The roommate laughed all the way home because the writer _ . Options: A: was embarrassed when he couldn't pay his breakfast B: would not listen to him when he left the house C: telephoned him to bring some books to him D: hadn't told Lynne the truth
B

I'm taking a test and have to guess the right answer to the question after the article. Article: Naps--short sleeps during the day--may improve memory, experts said recently. New research conducted by brain researcher Avi Karni of the University of Haifa in Israel explores the possibility that naps help lock in sometimes long-term memories. "We still don't know exactly how memory system works during sleep, but the results of this research suggest it is possible to speed up memory consolidation ," Karni said. Long-term memory refers to memories that stay with us for years, such as "what" memories -- a car accident that happened yesterday-- or "how to" memories, such as one's learned ability to play the pianos. Karni, also one of the authors of the study published in a recent issue of the journal Nature Neuroscience, instructed participants to learn a difficult set of finger games, then divided the study _ into two groups: one that napped for an hour, and one that didn't. The people who took an afternoon snooze showed obvious improvement in their performance by that evening. "After a night's sleep the two groups were at the same level, but the group that slept in the afternoon improved much faster than the group that stayed awake," Karni said. And the study also showed just how much faster a 90-minute nap could help lock in long-term memories. "Daytime sleep can shorten the time 'how to' memory weakens and forgetting starts,"Karni said, "Instead of 6 to 8 hours, the brain consolidated the memory during the 90-minute nap." Question: The text is most probably taken from _ . Options: A: a newspaper report B: a library guide C: a project handbook D: a science site
D