51.   Our concern is with the fire service and doing our small part to help that out.

52.   Our immediate concern was to stop the fire spreading.

53.   Our main concern is that the children are safe.

54.   Our main concern is with the distribution of wealth and consumption.

55.   Our primary concern is passenger safety.

56.   Our primary concern is to provide the refugees with food and health care.

57.   Screening routers and application gateway firewalls are frequently used in combination when security concerns are very high.

58.   Such concerns are most apparent in the case of financial institutions but have also arisen in other contexts.

59.   That was strange but my main concern now was how to get to her, since she obviously wanted me.