A:____ do you think is the most interesting invention?

A:____ do you think is the most interesting invention?
B:I think the most interesting invention is the shoes ____ adjustable heels.
A:The shoes with adjustable heels?I have never ___of it.What are they ___ ___?
B:Well,you can ___ the style of your shoes and make them go from casual to dressy.
A:That is cool!Whom were they invented ____?
B:Jayce Coziar and Jamie Ellsworth.How about you?What is your favorite invention?
A:The computer.It helps the people learn ____ about the world.

Awhat
B with
A heard, used for
B choose
A by
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