1.   Models can be useful and have a part to play, if built on a sound theoretical basis.

2.   Sometimes friendship is a sound basis for a good Marriage.

3.   That is a sound basis for setting out to communicate, persuade, sell or argue.

4.   The agreement established a sound basis for international commerce.

5.   There is a sound basis behind her success.

6.   This will be a sound basis for the School Development Plan described in the previous chapter.

7.   Training in local government offers you a sound basis for career flexibility.

8.   Yet, relations with Washington are on an extremely sound basis and there is a glimmer of improvement with Seoul.

9.   This gives the design team a sound basis for their detailed design work.

10.   A workable surveillance programme requires defined entry criteria and a cheap simple test, which is acceptable to the patient and which has a sound discriminatory basis.