Read the following article and select the best answer. Article: Burning less calories while walking seems like a bad idea, but making the walk easier may actually keep people on their feet longer, and that scientists say, has substantial health benefits. Analyzing the human walk, biomedical engineers Steven Collins and Greg Sawicki concluded that our ankles and calves perform motions similar to a spring coupled with a clutch that intermittently stores and releases energy. Sawicki, from the University of North Carolina, explained what's involved. "We found in basic science experiments that that system, your calf and Achilles tendon, works a lot like a catapult. So, the muscle holds on to the tendon and your body actually stretches your Achilles tendon quite a bit and then stores the energy in the tissue and then it's given back to _ you forward in the world," he said. Sawicki said he and his colleague Steven Collins at Carnegie Mellon University designed a mechanical device, made of carbon fiber and metal, that performs the same sequence of energy give-and-take outside the body. The system takes over part of the work of walking, and reduces the amount of required energy by as much as seven percent. Wearing the unpowered ankle exoskeleton can help people either walk farther with the same amount of energy, or restore the normal movement pattern for people who have trouble walking. Sawicki said it takes only a few minutes to get used to the exoskeleton but the wearer quickly learns to tone down the muscle energy as the device takes over part of the load. "You really don't notice it until when you take it off. And when you take it off you realize that it was there and giving you the boost," he said. Sawicki added that the device is primarily intended for people recovering from surgery or a stroke. But all persons who spend a lot of time walking, such as police officers or hospital personnel, could benefit from it. At the moment there are no plans to develop the ankle exoskeleton for the market, but the inventors say some manufacturers have expressed interest. Question: What is true according to the passage ? - The device can only benefit people with walking problems. - All people could benefit from it. - With the device, the walkers need seven percent as much as the energy otherwise. - The device can benefit people in the long term.
The device can benefit people in the long term.

Read the following article and select the best answer. Article: Five Booming Careers in Health Care Loving what you do is great,but knowing your career will be there tomorrow is even better. And when it comes to booming fields,the health care industry is one that's primed for growth. Want to prepare to take your place in the health care field?Check out these five indemand health care careers. Career 1 Medical and Health Services Manager If you want to take your leadership skills into the growing health care field,consider pursuing a career as a medical and health services manager. As a medical and health services manager you might plan,direct,and organize health services in an entire health care facility,or a specific department or clinical area,says U.S. Department of Labor. Daily duties could include handling a facility's finances,creating work schedules,and making sure that health care services are delivered efficiently. Career 2 Medical Assistant If you are interested in working in a doctor's office,consider preparing for a career in the indemand field of medical assisting. As a medical assistant,you could play a role in helping patients' visits go smoothly from when they first walk in the door. Your duties might include measuring vital signs,assisting the physician with examinations,recording health information,and scheduling appointments,according to the U.S. Department of Labor. Career 3 Registered Nurse Ready to put your helpful nature to use in the largest health care field?Look into prepping to pursue a career in registered nursing. As a registered nurse,you could work closely with patients by providing care,education,and emotional support. You might give patients medicines and treatments,observe their conditions,or perform diagnostic tests,says the U.S. Department of Labor. Career 4 Physical Therapist Assistant Want to enter an indemand health care field where you could really play a handson role in helping patients restore their physical functionality?If so,a career as a physical therapist assistant could be a good fit. Under the supervision of a... Question: Which of the following is TRUE about a physical therapist assistant? - His/Her duty might include measuring vital signs and recording health information. - His/Her function includes assisting patients and providing customer service. - He/She could play a practical role in helping patients restore their physical functionality. - He/She can help patients gain movement as they are in the illness.
He/She could play a practical role in helping patients restore their physical functionality.

(Question)
Read the following article and select the best answer. Article: A few years ago I was on a bicycle trip when I got off my bike for a rest. I sat down on the grass. A few seconds later, I was covered in ants. They were swarming all over me so I got up and brushed them off. It was a strange experience but I soon forgot about it. A couple of years later, I was living in Jordan. I had just moved into a modern flat and was unpacking plates when I saw something move out of the corner of my eye. I looked over at the kitchen drawer and there was a cockroach crawling out of it. I screamed. Then I grabbed a can of _ and sprayed it on the cockroach. He ran under the nearby bathroom door. It took me three days before I found the courage to open the bathroom door to see if he was still alive. He wasn't. Why did I react so violently to one lone insect when a closer encounter with hundreds of ants hardly affected me? The answer is easy: because cockroaches are creepy crawlies and ants aren't. Creepy crawlies are those little bugs which cause feelings such as anxiety - they make your skin crawl. Did you know that some people feel such a fear of bugs that it becomes a phobia ? Psychologists have offered many explanations. Some say we associate them with dirt and disease. Or that these are life forms that are so alien to us, that we find them disgusting for their dissimilarity. Insects, however, don't follow our rules - they just do what they want and invade our space. Unfortunately, although insects and bugs have been a successful animal species up to now, many of them, like many other species nowadays, are under threat of dying out. Entomologistswarn that this could upset entire ecosystems and lead to all kinds of disastrous consequences. So my advice to you is: the next time you feel the urge to stamp on, splatter or spray a creepy crawly, give a thought to the planet and stop. Question: .. Why did the author mention the ants in the beginning? - Because the experience with the ants presents a sharp contrast to that with the cockroach later. - Because the author wants to show her preference to the ants and her dislike for the cockroaches. - Because both ants and cockroaches are creepy crawlies that the author dislikes. - Because meeting the ants is an unusual experience that the author can hardly forget.
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Because the experience with the ants presents a sharp contrast to that with the cockroach later.