Listen and number.(听课本第2页的录音,排一排) ( )Wear these glasses, please!And don't touch anything. (1)This is a factory.These machines make crisps. ( )Don't touch the machines, please.They are dangerous. ( )It washes the potatoes. ( )This machine puts the crisps in their bags. ( )What does this machine do, sir? ( )Wait!You are a very good class.Wash your hands!You can all have a bag of crisps. ( )Look!This machine cuts the potatoes. |