2.A considerable amount of research shows that people tend to become bored when faced with a situation in which they must do the same thing day in and day out 　　3.We are positive that our countrys entry into WTO will benefit the development of national economy 　　4.we have to learn to cooperate with others and many of our own ideas have to be brushed aside for the good of the whole. 　　5.we have to come to the conclusion ,based on the above-mentioned examples, that there is something in saying that well begun, half done. 　　6.Studies show that most people believe that smoking is harmful to your health. 　　7.The successful manager of the opinion that to gain as much as possible from your subordinates you should treat them as your equals.