15. I have to remind myself that some birds are not meant to be caged. Their feathers are just too bright. And when they fly away, the part of you ________ knows it was an offence to lock them up does feel happy.

17. “He ________ lived well on his good looks, but instead he chose to thrive (成功) on his talent.” People praised Ning Zetao like this.

27. The beauty of a tournament like the World Cup is _______ it can be wildly unpredictable.

8.以下不属于课堂导入技能的原则的是（ ）。

5.课外、校外教育是课堂教学的延伸。

47. Over the past two decades, the popularity of the bicycle as a mean of transportation and recreation has increased tremendously in the United States.

4.温故而知新体现的学习迁移是（ ）。

21. Just as Martin Luther King, Jr. said, peace is not merely a distant goal that we seek, but a means ________ we arrive at that goal.

39. Difficulties can ______ a person’s best qualities.

3. James ________ so far behind in the race that he knew he had little chance of winning.

44. I had ______ closed my eyes when the telephone rang.

3.教育系统中两个最基本的要素（ ）。