1.   A certain amount of mental arousal is necessary but too much causes you to lose confidence in your own abilities.

2.   A certain amount of stress is unavoidable in daily life.

3.   A certain amount of your pension or allowance is yours to buy personal items like clothes, shoes and toiletries.

4.   A considerable amount of objectivity was necessary if a really wealthy man Decided to sweep a Girl off her feet.

5.   A considerable amount of research was done here by our science department.

6.   A considerable amount of work was involved in both setting up and updating the data base.

7.   A considerable amount of work was necessary to establish even this basic framework.