面向对象的方法优势体现在（）。
A.简化软件开发过程
B.支持软件复用
C.提高软件运行效率
D.改善软件结构
参考答案：A, B, D
- Can I pay the bill by check?
-- Sorry, sir. But it is the management rules of our hotel that payment ______ be made in cash.
A．can
B．shall
C．will
D．may
简述天然气汽车的优点？
