| A．Be careful. | B．You are careful. |
| A．Please stop! | B．Look at the light! |
| A．wait | B．go | C．stop |
| A．Turn left. | B．Don’t turn left. | C．Please turn left. |
( )| A．lights | B．traffic lights | C．traffic |
( )| A．turn left | B．turn right | C．turn on |
( )| A．read | B．wait | C．work |
( )| A．stop | B．stand | C．sit |
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