three possible theories of what a sea-dwelling microorganism’s eye might be for
1.The eye is used for following preys;
2.The eye is used for sensing sunlight;
3.The eye is used for aiming at other tiny life forms when it is going to stab them.
1.Other closely related microorganisms,which have no eyes,could follow their prey successfully.Therefore,their eyes must be for other purposes;
2.Scientists studying the evolution of microorganism find that they are becoming less and less dependent on sunlight for energy.Compared with their ancestors,the sea-dwelling microorganism is with a much more complex eye,so it must have other functions;
3.After examining the eye thoroughly,researchers find that its eye couldn't focus quite well,thus not being able to have better accuracy at other tiny life forms when stabbing them.
Task 2 INDEPENDENT 独立写作
The government wants to improve the education of high school,and there are two plans:
1.choose a group of good teachers and train them first,and after that let them go back to their schools and train other teachers;
2.provide training for every teacher online,with providing online materials and let them study individually.