31.   You learn how to use relaxation techniques to relax your body and lower the pitch of the tone.

32.   In mathematics, we use many techniques of problem-solving.

33.   The new technique has been used to identify the sex of foetuses.

34.   We can use genetic engineering techniques to isolate the gene that is responsible.

35.   Use this technique to control your level of arousal.

36.   Scientists use various techniques to date fossils.

37.   For instance, John Uelses, a former pole-vaulting champion, used daydreaming techniques before each meet.

38.   The former method simply consists of setting an elephant to work and beating him until he does what is expected of him.

39.   The latest computer modelling techniques are used to optimise refining process improvements.

40.   Since the population of adult males in Britain is many million, there are obvious savings to be made using these techniques.