41：所有危险的东西都不能让孩子够着。(out of reach)
42：学习如何进行急救非常重要。
43：他说他对我所作的事情感到满意。(satisfy)
44：这个纪念碑是为了纪念白求恩。(in honor of)
45：紧急情况下分秒必争，懂得应该作些什么可以意味着生死之差。
參考答案:All the dangerous objects should be out of children's reach
Learning how to give first aid is very important
He said he was satisfied with what I had done
This cenotaph is in honor of Dr.Bethune
Seconds count in emergencies,knowing what to do means a difference between life and death
