Hoàn thành bài viết sau bằng cách chọn 1 từ thích hợp nhất để điền vào chỗ trống: "Fathers in today families are spending more time with their children than at any point in the past 100 years. Although the number of hours the average woman spends at home with her children has declined since the early 1900s, as more and more women enter the workforce, there has been a decrease in the number of children per family and an increase in individual attention to each child. As a result, mothers today in the United States, including those who work part- or full-time, spend almost twice as much time with each child as mothers did in the 1920s. People (1) ____ raised children in the 1940s and 1950s typically report that their own adult children and grandchildren communicate far better with their kids and spend more time (2) ____ with homework than they did. America's children are also safer today than they've (3) ____ been. An infant was four times more likely to die in the 1950s than today. A parent then was 27 per cent more likely to lose an older teen to death. If we look back over the last millennium, we can see that families have always been diverse. In each period, families have solved one set of problems only to face new (4) ____. What works for a family in one economic and cultural setting doesn't work for a family in another. What's helpful at one stage of a family's life may be destructive at the next stage. If there is one lesson to be drawn from the last millennium of family history, it's that families always have to (5) ____ with a changing world. 1. A. whom B. which C. who D. when 2. A. helping B. to help C. help D. on help 3. A. never B. already C. ever D. just 4. A. challanger B. challenges C. challenging D. challenged 5. A. put up B. live up C. go up D. catch up