启发思考,Dont turn left,Dont turn right,What do the signs mean,Dont smoke,Dont park,What do the signs mean,The baby is sleeping! What are prohibited（禁止的）,Dont sing here! Dont dance here! Dont talk here! Dont play here,自主或小组探究,This is a food factory,potatoes,crisps,What can you see in the factory,machines,What can you see in the factory,What do the machines make,They make crisps,What does this machine do,It cuts the potatoes,What does this machine do,It puts the crisps in their bags,What does the man
