[解析]
(1)to stop the spread of the desert.细节理解题。根据The argan forest in Morocco (摩洛哥),northwest Africa,is a very place.The trees help to stop the spread of the desert.可知摩洛哥的阿甘森林,非洲西北部,是一个非常好的地方。这些树有助于阻止沙漠的蔓延。故答案为 to stop the spread of the desert。
(2)A long growing time .细节理解题。根据It takes between 40 to 60 years for an agran tree to become an adult.But its long growing time can be a problem.可知一棵阿格兰树需要40到60年才能成年。但它的长时间生长可能是一个问题。故答案为A long growing time。
(3)in the 1990s.细节理解题。根据 In the 1990s,people in Europe began to learn about the special qualities of the oil,so the production of argan oil started to change.可知20世纪90年代,欧洲人民开始了解这种石油的特殊品质,因此阿甘石油的生产开始发生变化。故答案为in the 1990s。
(4)three ways .细节理解题。根据 In the past,they used it in cooking,on their skin,and to treat sickness.可知在过去,他们用它做饭,在他们的皮肤上,并治疗疾病。故答案为three ways。
(5)a product that makes a difference.推理判断题。根据 To local people,argan oil is more than just something used in their daily life.It is a product that makes a difference.可知对当地人来说,阿甘油不仅仅是日常生活中使用的东西。它是一种与众不同的产品。故答案为a product that makes a difference。