阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。 Smell is an important sense.Certain smells can help you look back _

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。
Smell is an important sense.Certain smells can help you look back ___41___a memory. Other smells,like smoke from a fire,can warn you of danger.When you can't smell things you enjoy,like your morning coffee or spring ___42___(flower),life may seem boring.
As you get older,your sense of smell may fade.Your sense of smell is ___43___(close) Connected with your sense of taste.When you can't smell,food may be ___44___(taste).You may even lose interest in ____45____(eat).
Many problems cause a loss of smell ___46___lasts for a short time.This short-time loss of smell may be due to a cold,certain cancer treatments or a harmless growth in the nose.Some things can cause  ___47___long-lasting loss of smell.A head ___48___(injure),for example,can damage the nerves(神经）in association with smell.Sometimes,losing your sense of smell may be a sign of a much ___49___(serious)disorder,such as Parkinson's disease or Alzheimer's disease.Be sure ____50____(tell)your doctor about any change in your sense of smell.
【答案】41. on/upon    
42. flowers    
43. closely    
44. tasteless    
45. eating    46. which/that    
47. a    48. injury    
49. more serious    
50. to tell
【解析】