1. Today a very wide spectrum of biological scientists are needed, both to develop the biotechnology of the next millennium and to ensure the ____ of life in our planet.

2. These novels illustrate the authors ---- for the struggles of young people and the proper help that should be given.

3. Its worth remembering that his ---- of the downward trends in output over recent years is not the only one.

4. A fair proportion of the workforce now work from their homes, a ---- that has been made possible by computers.

5. The genetic fingerprinting technique, which was developed in the UK and is now used as a ---- of legal identification, determines the pattern of certain parts of the genetic material DNA that is unique to each individual.

6. Volcanoes are built by the ---- of their own eruptive products, which are lava, ash flows, airborne ash and dust.

7. Education is both a consumption and an investment good. The---- of knowledge by reading a book can give pleasure and benefits to an individual equivalent to consuming an ice-cream or seeing a film at the cinema

8. Anthony Powell, the contemporary British novelist, shows in his writing great familiarity with the work of Proust while avoiding much direct ---- to him.

9. If the _____ of profits falls in one area of activity, entrepreneurs may move their resources to an industry where the returns are higher.

10. A basic _____ of amphibious warfare is undoubtedly command of the sea.