1.   During the summer, air conditioning is considered essential.

2.   He had failed because of a lack of talent for impromptu speaking, considered essential for the task he was contemplating.

3.   Steve Scrutton considers legislation essential in many areas.

4.   Such work is considered essential in studying human genetics and in testing some types of new drugs.

5.   This part of social inquiry is considered essential by Hughes.

6.   The retention of Balcerowicz in the government was considered essential to reassure Western creditors.

7.   This was widely considered essential to their chances of securing the office over the Socialist candidate.

8.   Course modules in Animal Production Systems and Prediction and Control of Animal Performance are considered essential.

9.   Course modules in Crop Production Systems and Crop Protection are considered essential.

10.   Course moduels in Resource Economics, Environmental Economics, and Ecological Ethics are considered essential.