41.   The arrangement of the oceans in relation to the continents plays a Decisive role in creating and sustaining life on Earth.

42.   The chairwoman started her working life on the shop floor.

43.   The idea that there is life on other planets is the central premise of the novel.

44.   The international community is helping to prolong the hostilities and the loss of lives on both sides.

45.   The three of them eked out a life on public assistance.

46.   There has always been a lot of interest in the question of life on other planets.

47.   These simple, single-celled creatures are the most primitive forms of life on earth.

48.   They were demonstrating that life on the Web is fraught with peril.

49.   They were designed principally to search for direct and indirect evidence of life on the Martian surface.

50.   They were the pioneers willing to accept the rough edges of life on the technological frontier.