单项选择题
Whenever work is being done, energy()from one form into another.
A. converts B. converted C. is converted D. is being converted
单项选择题 Often considered in common thought as(), language, culture, and personality are in fact inseparable
单项选择题 The pursuit was()when it was clear that we had won the day
单项选择题 Largely due to the university tradition and the current academic milieu, every college student here works ()