Article: There is very simple way of measuring the height of a water-tower, which we cannot measure by climbing. Suppose, for example, that we wish to find out the height of the water-tower, AB, in a factory. We first of all go to where the water-tower is standing and measure a distance of, say, 25 feet from it. Then we take a stick, and stand it in the ground at the spot we have just marked. Let us suppose the stick we are using is 4 feet in height. We now walk farther away from the water -tower in the same straight line as when we measured off the distance of 25 feet. We go from the water-tower until we come to point E, where with our head on the ground, we see the top of the stick and the top of the water-tower in the same height line---that is, the top of the stick just covers the highest part of the water-tower. Every schoolboy can work out the height of the water-tower now. Suppose that the line CE is five feet. We know that the stick is 4 feet high and the distance BE is 30 feet. Thus, 5 is to 4 as 30 is to AB. Question: To measure a water-tower in this way, _ . Yes or no, is the answer "we have to use nothing but a stick"?
Yes

Article: I am not just a successful architect . I also like to play the piano. In my spare time I often turn some dry musical symbols into beautiful music. Many years ago, while I was in a university studying architecture, I worked in a workshop. During the break I found an old piano in the corner of the room. With the allowance of the boss I sat down to have a try. Following my fingers the keys danced brilliantly and at the same time beautiful music flew out and then to every part of the room. All my workmates suddenly stopped talking and made their ears ready for my music. After graduation, I began to devote myself to my profession. All my musical talent was wasted into zero. Then one evening we went to a concert at which Mr. Stevenson, one of the ordinary workers in my company, sang us some beautiful songs. His musical talents made us all surprised. We all enjoyed ourselves with his beautiful voice so much that we even thought him a professional singer. I was also reminded of my musical talent. I began to train in a training center. My teacher was strict with me. He encouraged me to train every weekend and each time he asked me to play better than the last. Now I can proudly say I am also a successful pianist because every time I played on the stage fresh flowers and warm clapping would come from my audience. So I say, my friends, don't busy yourself with your work too much. Find some time to develop your potential talent and your life will become more wonderful. Question: According to the passage, the author is not only a successful architect but also a good _ . Yes or no, is the answer "pianist"?
Yes

Article: It's 10:30 p.m. and 11-year-old Brandon Blanco is sound asleep at home. Suddenly, a loud noise wakes him up. Naturally, Brandon reaches for his cell phone. He blinks twice, and the message on the screen becomes clear: " R U awake?" But the late-night text does not annoy Brandon. He gets frequent messages and calls, even after bedtime. And he can't imagine life without them. " If I didn't have a cell phone, I wouldn't be able to talk to my friends or family as often," he told TFK. Brandon's use of technology doesn't stop there. He also has a computer, a TV and three video-game consoles in his room. With so many choices, it is no surprise that when he is not at school, he spends nearly every waking minute using one or more of these devices. Brandon is hardly alone. According to a recent study by the Kaiser Family Foundation, kids aged 8 to 18 are spending more time than ever before using electronic devices. How much time? More than seven and a half hours a day on average, the study found. That's about an hour more than just five years ago. The jump is the result of a huge explosion in mobile devices, says Victoria Rideout, the lead author of the study. Today, nearly seven out of ten kids have cell phones. Just five years ago, it was four out of ten. " These devices have opened up many more opportunities for young people to use media, whether it's on the bus, on the way to school or waiting in line at the pizza parlor," says Rideout. Often, kids multitask, or use more than one device at a time. " If you've got a chance to do something on your computer and take a phone call and have the TV on in the background, why not?" Media expert Cheryl Olson says. Most experts agree technology has much to offer kids. But some worry the kids could be missing out on other activities like playing outside or hanging out with friends. " It's a matter of balance," says Olson. " You've got to work on it." Multitasking while doing homework is another concern. Some kids listen to music, watch TV or use the phone while doing their... Question: The text is mainly about kids' _ Yes or no, is the answer "using electronic devices"?
No