根据首字母填空It is sad that every day some people are killed(丧生）while they are crossing the roa

It is sad that every day some people are killed(丧生）while they are crossing the roads.Many of these people are o__81____ people and children.Old people are often killed because they can’t see or h_82_____ very well.Children are killed because they are not c___83___.Some young people are listening to MP3 when they are walking a_84_____ the roads.They forget(忘记) to look and listen to the traffic before they cross the roads.
A car or a bus can’t s_85_____ quickly.If a car is going very fast,it will r___86____many metres before it stops.Some people don’t understand this.They think a car stop at once.It is d__87_____to know how fast a car is moving.The o_88______ way to cross the roads safely is to look b_89____ ways,right and left.Then if the roads are empty,you can cross t__90____.

81. old
82. hear
83. careful
84. across
85. stop
86. run
87. difficult
88. only(我觉得ok其实也可以的~~不过意思就不一样了，您斟酌着选择哈~)
89. both
90. then

81. old 82. hear 83.careful 84. across 85. stop 86run .89both 90 then

81.old 82.hear 83.careful 84.across 85.stop 86.run 87.difficult 88.only 89.both 90.then

你好！ 81 old 82 hear83 careful 84 across 85 stop 86 run 87difficult 88only 89 both 90 them 我认为最后一空填them更合适 仅代表个人观点，不喜勿喷，谢谢。