完形填空
As a teenager, I am often asked what I am going to be in the future. A lawyer? A doctor? Or a scientist? No, my ideal career is to be a teacher. One of the 1for that is I want to be a teacher like Mr. Chen.
"Look! Do you know what it is? A-ha, it's the 2 ! And it will always move around the sun."Mr. Chen said and pointed to his head. He then touched the nose and 3 , "Can you tell me the name of this mountain? It is the highest mountain on Earth! What's the 4of it? Yes, it's 8844.43 metres…" I'll never forget my first geography lesson. He was 5 humorous that we all fell in love with his lessons 6. It's Mr. Chen who opened the door of geography for us.
Generally speaking, most of the teachers are strict7students and sometimes a little bit demanding（苛求的）, not so with Mr. Chen. He is a lighthouse, showing us the way to the treasure of knowledge. He is a friend and easy to get 8 with, always encouraging us to speak out loud without 9our shyness and other disadvantages. He is an example, volunteering his time to students and other teachers.
One day I happened to meet him in the hospital. Seeing the cut on his arm, I realized he was donating his 10. I was moved and was 11 another lesson, a lesson of love and devotion.
Every time I see my globe（地球仪）, it would 12me of Mr. Chen. He is the most unforgettable teacher I have 13met and he will always be. Someday I hope I am 14 to be a teacher like him.
Thank you, Mr Chen, thank you for making learning not a job but a joy.
Thank you for helping me to discover what I do best and to do it even 15Thank you for understanding all of us and giving us the time and care each of us needs.
牛是人类生活中的一种重要的肉制品、皮毛制品的原料，但哺乳动物妊娠时间长，每胎产仔少，繁殖速度比较慢。要加快优良种畜的繁殖速度，目前最好采用的方法是（ ）
