根据储罐形状，金属油罐又可分为（）、（）和（）三类。
参考答案：立式圆柱形油罐；卧式油罐；特殊形状油罐
— Will you please take a message for the headteacher?
A． It doesn’t matter
B．Sure. I’ll be glad to
C． Yes, I’ll take
D．I can help you
— __________ will the bridge be finished?
—In a few months. [ ]
A. How soon
B. How long
C. How often
D. How far
