如图所示，光滑斜面的倾角α=30°，在斜面上放置一矩形线框abcd，ab边的边长l₁=lm，bc边的边长l₂=0.6m，线框的质量m=1kg，电阻R=0.1Ω，线框受到沿光滑斜面向上的恒力F的作用，已知F=10N．斜面上ef线（ef∥gh）的右方有垂直斜面向上的均匀磁场，磁感应强度B随时间t的变化情况如B﹣t图象，时间t是从线框由静止开始运动时刻起计的．如果线框从静止开始运动，进入磁场最初一段时间是匀速的，ef线和gh的距离s=5.1m，求：

根据短文内容，选择所给词的适当形式完成短文。                

The most important person in the world is your mother. She looks after you all the ____ .On cold winter days, she always tells you ____on more clothes. She always stands in the wind waiting for you back from school every day. When you hurry to leave home for school without breakfast, she always feels ____  about you at home. She knows about your study and spends much money ____ your school things. Mother can do everything for you day after day. What ____  love that is in the world! We’ll always remember mother love.