社团贷款实行以下运行模式（）。
A、“谁牵头、谁负责、谁评审”
B、“谁营销、谁牵头、谁负责”
C、“谁营销、谁牵头、谁评审”
参考答案：C
Before she began to study at Beijing University, she（）in a factory for five years.
A.had worked
B.worked
C.has worked
D.would work
（）会造成钢水喷溅。
