2b Listen again and complete the chart below.
Alex: Hi,Carol.Wow,what are those?
Carol: Hello,Alex.Oh,these are some of the interesting inventions that I'm writing about for my English homework.
Alex: I see…What's that,then?
Carol: They're shoes with lights.You use them for seeing in the dark when you get up at night.
Alex: Oh,that's a cool idea!I always hit my toe on something on the way to the bathroom at night.
Carol: Next is a special ice-cream scoop.This is my favorite invention.It runs on electricity and becomes hot.
Alex: I know what it's for!It's used for serving really cold ice-cream.
Carol: Yes,that's right!The last invention I'm going to write about is shoes with special heels.You can move the heels up and down.
Alex: What are they used for?
Carol: Well,you can change the style of your shoes. You can raise the heels if you are going to a party or lower them if you are just going out for shopping.