53. Why do scientists clone monkeys?

西方教育史上三大里程碑不包括（ ）。

豁达表现为教师气度宽宏大量，但学生违反纪律就绝不能宽容学生的错误。  

15. When fully ________ to work, ________ was often the case, he would forget about eating or sleeping.

21. She asked the young man to be brief and ________ as she had little time to spare.

51. What can we infer from the passage?

10. “The thirst for knowledge is the strongest ________ there is a barrier,” says the president of the Italian Union of the Blind.

1. —Who won the lead position in this variety show?—Jack, of course.________. I could never hear a better voice than him.

小刚是班里有名的淘气鬼， 但通过班主任章老师的长期教育，小刚开始认识到自己的错误，把这种错误归结为自己的原因，从而产生改过自新的意向。小刚属于品德不良纠正的（ ）

18. The professor ________ sit in his study for hours when he worked on a new project.

28. —You’ve left the light on.—Oh, so I have. ________ and turn it off.

妈妈对磊磊说：“先吃了你的蔬菜，然后你就可以吃甜点。”这运用了心理学的（ ）。