51.   A series of fortunate opportunities opened to him.

52.   Bob tried the door.

53.   As I see it, Llewelyn has three choices open to him.

54.   Bill was among the first to gain entry to Buckingham Palace when it opened to the public recently.

55.   My mind is always open to new ideas.

56.   They later intervened on his behalf when he was investigated for criminal fraud, thereby opening themselves to allegations of having accepted bribes.

57.   It also suggested that WEU membership be opened to non-EC NATO members and that links be set up with east European countries unable to join NATO.

58.   Reports suggested that differences between the two sides had centred on the number of flights conducted, the type of surveillance equipment used and the areas open to surveillance.

59.   The Mexican petrochemical area would largely be opened to foreign investment and foreign gas companies would be allowed to sell gas, under PEMEX supervision, to Mexican industry.

60.   The North Korean government restated its position that such an agreement could be arrived at only if US military bases in South Korea were opened to North Korean inspection.