——Why are the housing prices in big cities going up all the time?

——One reason is that people are__________ into overcrowded cities in great numbers.

A．breaking

B．filling

C．pouring

D．hurrying

在FlashMX中，要绘制精确的直线或曲线路径，可以使用()。

A．钢笔工具

B．铅笔工具

C．刷子工具

D．A和B都正确