Составить предложения со словами density, popularity, productivity, complexity, activity, responsibility, capability, necessity, humidity, changeability, burability, falsity,possibility

The density  of the air is today one double
recently made by popular singers
the performance of the product increased
the complexities of travel in that you have far to go
active person worked in a lot of office
Anna took responsibility for your class
the boy was capability to buy a car