–I’m sure John ____ the first prize in the final.

–I think so. He ____ for it for months.

A．will win; is preparing

B．would win; was preparing

C．would win; had been preparing

D．will win; has been preparing

采用高圆簧作为二系悬挂则（）。

A、使机车蛇稳增大曲线通过能力减小

B、使曲线通过性能增大蛇稳减小

C、使机车蛇稳和曲线通过性能均得到增强

D、垂向缓和振动对横向不起作用