1) Do the Wilsons celebrate their birthdays and anniversaries?.
Yes, they do. They usually go out to a restaurant or have parties at home.
2) Does Mrs Wilson sometimes give her children birthday parties?
Yes, sometimes she gives her children birthday parties at home.
3) Is Mrs Wilson five years younger than Mr Wilson?
Yes, Mrs Wilson is five years younger than Mr Wilson.
4) Was Adam born on January 5, 1991?
No, Adam was born on February 29, a year after Kate, who was born on January 5, 1991. So Adam was born on February 29, 1992.
5) Are there 28 days in a leap year?
No, in a leap year February has 29 days. In common years, February has 28 days.