Use "major task" in a sentence

1. With the completion of the rice genome sequence, functional genomics becomes a major task in functional genomics.

2. To realize the transformation of Chongqing"s dual economy structure is the major task of Chongqing"s industrialization and modernization.

3. On 5 April 1942, Tone was part of a major task force which launched 315 aircraft against British-held Colombo, Ceylon.

4. On 5 April 1942, Chikuma was part of a major task force which launched 315 aircraft against British-held Colombo, Ceylon.

5. A major task of the later software was to arrange that the exposure was chosen automatically according to the current illumination.