阅读理解Inrecentyears,manyofficesupplycom

阅读理解In recent years, many office supply panies have begun to sell adjustable desks.These so-called sit / stand models are equipped with an electric motor that lets them shift from chair height to person height at the push of a button.Unfortunately, sit / stand desks tend to be expensive, hard to find and not very easy to test in person. I discovered that when I worked standing up, my mind was clearer and new ideas kept ing to me.I suspect that this is because when you're standing, you feel a bit unchained from your desk.If I got stuck on a word or sentence as I wrote it, I found myself shaking my arms, bouncing （跳） on my feet or stepping away from the desk for a bit — things I couldn't do in a chair.Often, standing up seemed to relax my mind enough for me to get over creative barriers. There's another thing about standing for a long time: I tend to get hungrier than I do when I sit on a chair.That feels like confirmation（证实） of the stand-up advocates’ belief that you burn more calories when you stand than when you sit.For this reason alone, I' m hoping that one day mass-market furniture panies can make many low-priced versions of sit / stand desks.We could all work with a bit more standing up.1.The author likes standing up while working because __________.A.he wants to show that he has a lot of courageB.researchers say standing makes one healthierC.he intends to catch up the fashion trendD.he hopes to improve his work and relax himself2.It can be inferred from the text that   ________.A.adjustable desks are mass-produced nowB.adjustable desks are easy to operateC.cheaper adjustable desks will soon be availableD.adjustable desks can be tried out easily3.What is the main idea of the text?A.Standing up at work is a better choice.B.Standing up at work takes courage.C.Standing up at work burns more calories.D.Standing up at work will replace traditional sitting.