班级________ 姓名__________ 分数__________
I．完形填空
（2011·全国新课标卷）
In our discussion with people on how education can help them succeed in life,a woman remembered the first meeting of an introductory__36__course about 20 years ago.
The professor __37__the lecture hall,placed upon his desk a large jar filled with dried beans（豆）, and invited the students to _38_how many beans the jar contained.After __39__shouts of wildly wrong guesses the professor smiled a thin,dry smile,announced the __40__ answer,and went on saying,”You have just __41__an important lesson about science.That is Never__42__ your own senses.”
Twenty years later,the __43__could guess what the professor had in mind.He __44__himself,perhaps,as inviting his students to start an exciting __45__into an unknown world
Invisible（无形的）to the 46 ,which can be discovered only through scientific 47 .But the
