(2014·天津和平区一模)The medicine should usually be kept out of the________of children at home.

. It is a ___________in western societies that women get married in long white dresses.

 Arriving home，the boy told his parents about all the________which occurred in his dormitory.

. —Li Hua was in London for two years.   —It’s no ___ he can speak English so well.

According to a UN report，one third of the world population have no    to clean drinking water and health care.