A: What beautiful pictures!

B: No, they're not pictures. {#blank#}1{#/blank#} 

A: Stamps? {#blank#}2{#/blank#}        

B: They are used for posting letters.

A: {#blank#}3{#/blank#}      

B: They were invented by an Englishman named Rowland Hill.

A: {#blank#}4{#/blank#}     

B: I've got more than 700 of them.

A: By the way, what are you going to be when you grow up?

B: I'm going to be a stamp designer.

A: {#blank#}5{#/blank#}      

B: I'm going to study art really hard and go to an art college.

A: I hope your dream can come true.

B: Thank you.

When {#blank#}1{#/blank#} the car {#blank#}2{#/blank#}?

A: What's that, Nick?

B: Oh, it's my {#blank#}1{#/blank#}, Come and look at it, Bob.

A: Is it a model(模型) car?

B: Yes, and it's a "clean car".

A: It's {#blank#}2{#/blank#}, How does it go?

B: It uses sunlight or {#blank#}3{#/blank#}.

A: That's great. The air would be clean {#blank#}4{#/blank#} all the cars were like it.

B: You're right, Bob.

A: Could you make one for me, Nick?

B: Sure. You'll have a {#blank#}5{#/blank#} one next Monday.

A: Thank you.