D. By comparing other scientists’ discoveries.

　　69. The author wrote the passage to ___________.

　　A. present a finding

　　B. test a theory

　　C. provide a solution

　　D. describe an experiment

　　70. What does the passage mainly talk about?

　　A. Forest plants.

　　B. Animal doctors.

　　C. Chimp’s diets.

　　D. A cure for cancer.

　　第二节（共5小题；每小题2分，共10分）

　　根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

　　Online courses are a terrific way for busy people.

　　71

　　You might have a full time job with a packed schedule and need to study at irregular times. You might want to benefit from the quality of education in another country. In this article you will learn about what it takes to succeed in online courses.

　　72

　　Time management is an important skill to develop. First, calculate how much time you will need to study every day. Then, allot（分配）a specific time in your schedule for studying. If you are busy during the day, then separate a few hours at night for studies. If you do not schedule study time, chances are you will not get any.

　　Then, the good place to study can be different from student to student. Some prefer to study in complete silence. Others need some kind of soft music around them to concentrate.

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