根据所给汉语提示完成下列句子.
小题1:天黑了，请打开灯.
It's getting dark.Please                  the light．
小题2:坚持你的梦想，总有一天它们会实现．
Hold on to your dreams，one day they may                    ．
小题3:这是一种阻止我们漂浮在空中的力量.
It's a force that         us from floating in the air．
小题4:至于家庭作业，百分之九十五的学生每天都做.  
         for homework．95％of the students do homework every day．
小题5:他们结婚已超过15年了.  
They have already         married for more than 15 years.