根据所学常识判断下列说法是对(√)还是错(×)。

( ) 1. There are always three traffic lights: red, yellow and green.

( ) 2. It's not fast to go by plane.

( ) 3. If you go on foot, you don't need (需要) to know the traffic rules.

( ) 4. In the US, drivers drive on the right side of the road.

( ) 5. If the light is yellow, you can go.

将所有字符转换为大写的输入掩码是（ ）。

A．>

B．<

C．0

D．A