填空题

There are many reasons why family life in Britain has changed so much in the last fifty years. The (36) of women in the early part of the (37) century and the social and economic effects of World War II had a great (38) on traditional family life. Women became essential to industry and the (39) . During the war they had worked in factories and proved their worth, now, with the loss of millions of men, their services were (40) to the nation.
More recently, great (41) in scientific knowledge, and (42) in medicine, have had enormous social consequences. Children are better cared for and are far (43) . Infant death rate is low. (44) . (45) . But these developments have affected all aspects of society. It is particularly interesting to note that (46) .