2013年高考英语江西卷的书面表达范文中有这样一句话：
The activity benefited us a lot. Not only did it get us close to nature and give us relaxation from heavy school work, it also promoted the friendship among us. What a wonderful time we had!
大意是：这次活动使我们受益匪浅。不但使我们接近了大自然，从学校繁重的作业中解脱出来，而且促进了我们之间的友谊。我们玩得真开心！
我觉得句中的the friendship among us 似乎应改为the friendship between us，因为这里是指彼此之间的友谊，我的理解对吗？请专家老师指点！谢谢！