"Efficiency is the by-product of comfort," says Dr. Erwin Tichauer of New York University. To prove this____, Dr. Tichauer uses his capability to find_____ways to do things. _____, he felt that the traditional kind of pliers(钳子）______a better design. The usual____limited hand movement and used unnecessary force because it bent the_____. So he designed a pair of pliers to allow the wrist to remain in a comfortable position.

     To improve the design of______and then make work easier, Dr. Tichauer____the old tools. He asks such questions as: why ____a stepladder have four legs____three are more stable? Why dose a screwdriver (螺丝刀) have to be made with straight handles? After testing his____, he has invented a new tool that causes less muscle injury and is more efficient. 

   Tichauer is not interested in getting ____ from his inventions. In fact, he says, "We _____ people to steal from us. At New York University, we do not patent(注册专利）knowledge or invention."__ __companies have adopted some of his inventions.

     As a biochemist, as well as inventor, Dr Techauer____the effect of stress on areas of the body. Even easy______work may put heavy stress on small areas of body and____causes a serious disease. Thus his studies of workers in factories who use the____tool all day long are extremely____in learning about the damage on human body? Dr. Techauer knows that he can not redesign the ____ so he redesigns the tool!

1.A. argument       B. impression                    C. statement         D. expectation

2.A. unusual                    B. easier               C. new                          D. correct 

3.A. Especially         B. What's more                 C. Meanwhile                 D. For example

4.A. followed                  B. showed                       C. needed                     D. proved

5.A. design           B. habits               C. materials                    D. work

6.A. body               B. finger                      C. hand                  D. wrist

7.A. pliers             B. a tool                        C. a stepladder        D. screwdrivers

8.A. tests                       B. uses                 C. fixes                  D. destroys

9.A. could             B. will                           C. would                       D. must

10.A. if                  B. because           C. when                        D. once

11.A. inventions      B. theories                     C. tools                         D. questions

12.A. recognized     B. famous              C. excited                     D. rich

13.A. encourage              B. prevent             C. warn                        D. forgive

14.A. Modern                 B. Research                      C. Commercial         D. Industrial 

15.A. teaches                 B. studies              C. produces                   D. discovers

16.A. physical         B. daily                 C. office                 D. research 

17.A. in time                  B. in addition                    C. immediately                D. commonly

18.A. wrong                   B. old                            C. same                  D. heavy

19.A. suitable                 B. valuable             C. logical                D. practical

20.A. work                    B. study                C. labor                  D. body