【正文】 to produce fertilizers, machinery and harvesting systems. This team effort has now produced crops uniformly waist high or less so that they are better suited to mechanical harvesting. Similar advances with other crops have released people from hard and boring jobs for more creative work, whilst machines harvest crops more efficiently with less waste. Providing more food for the rapidly increasing population is yet another role for the mechanical engineer. 81. According to the passage, when would most weight be imposed on hipjoints? A. When one is walking. B. When one is running. C. When one is standing. D. When one is lying down. 82. Engineers regard the replacement of hipjoints as a(n) ______ problem. A. mechanical B. medical C. health D. agricultural 83. According to the passage, how do engineers contribute to increasing efficiency of the agricultural industry? A. By working with farmers. B. By working in teams. C. By growing crops of the same height. D. By making agricultural machinery. 84. According to the context, “ This team effort” in Paragraph Two refers to ______. A. mechanical engineers B. doctors and engineers C. biologists, doctors and farmers D. farmers, biologists and engineers TEXT B Nowadays, a cellphone service is available to everyone, everywhere. Probably thousands of people have already been using it, but I just discovered it, so I’m going to claim it and also name it: Fake Foning. The technology has been working well for me at the office, but there are infinite applications. Virtually in any public space. Say you work at a big university with lots of talky faculty members buzzing about. Now, say you need to use the restroom. The trip down the hall will take approximately one hour, because a person can’t walk into those talky people without getting pulled aside for a question, a bit of gossip, a new read on a certain line of Paradise Lost. So, a cellphone. Any cellphone. Just pick it up. Don’t dial. Just hold that phone to your face and start talking. Walk confidently down the hall engaged in fake conversation, making sure to tailor both the topic and content to the person standing before you whom you are trying to evade. For standard colleague avoidance, I suggest fake chatting about fake business: “Yes, I’m glad you called, because we really need to hammer out the details. What’s that? Yes, I read Page 12, but if you look at the bottom of 4, I think you can see the problem begins right there.” Be animated. Be engaged in your fake fone conversation. Make eye contact with the people passing, nod to them, gesture keen interest in talking to them at a later time, point to your phone, shrug and move on. Shoppers should consider fake foning anytime they spot a talky neighbor in the produce department pinching (用手捏 ) unripe peaches. Without your phone at your face, you’d be in for a 20 minute speech on how terrible the world is. One important caution about fake foning. The other day I was fake foning my way past a colleague, and he was actually following me to get my attention. I knew he wanted to ask about a project I had not yet finished. I was trying to buy myself some time, so I continued fake foning with my doctor. “So I don’t need the operation? Oh, doctor, that is the best news.” And then: Brrrrrmg! Brrrrrmg! Brrrrrmg! My phone started ringing, right there while it was planted on my face. My colleague looked at me, and I at him, and naturally I gasped. “What is the matter with this thing?” I said, pullin g the phone away to look at it, and then putting it back to my ear. “Hello? Are you still there?” Oops. 85. Which of the following statements is INCORRECT? A. Cellphone service is popular among people. B. Cellphone has much use in office. C. Fake foning is a new cellphone service. D. Fake foning is a new discovery. 86. What is fake foning? A. A strategy to avoid people. B. A device newly produced. C. A service provided everywhere. D. A skill of munication. 87. In the author’s opinion, i n order to make fake foning look real one has to ______. A. talk about interesting matters B. behave politely to people passing by C. hold the phone while walking D. appear absorbed in conversation 88. What does the last example show? A. One effective way is to fake fone one’s doctor. B. One has to be careful while fake foning. C. Fake foning may not deceive people. D. Fake foning is always quite successful. 89. After his phone suddenly began ringing, the author ______. A. immediately started talking to the