溶剂再生釜的正常进料来自（）。
A.地下罐
B.溶剂罐
C.汽提塔回流罐
D.循环热溶剂系统
参考答案：D
My parents bought me an electric bicycle that ______ them 2,000 yuan last month.[ ]
A. cost
B. spent
C. costed
D. takes
