Free _____ of shampoo is distributed from door to door. A：sample B：example C：product

Samples of this article will be sent to you free ______.A．of accordB．on requestC．for payme

In Australia, ______ is compulsory and free.A．the elementary education and vocational educ

In America, ______ is compulsory and free.A．the higher education and elementary educationB

In Britain, primary education is free and compulsory from age______toA．4B．5C．6D．7

Elementary and secondary education is______.A．freeB．free and attendance is required by law

As is implied in the passage, energy assessment is______.A．free of chargeB．worthwhile in t