题目

As is known to all, we live in a world of germs（细菌）. It is impossible to avoid exposure. Genetic makeups may give some people ____41____ advantage over others. However, it does not stop people from becoming sick. All of us have been a victim of an ____42____(ill) at some point in our lives. Moreover, it is likely that we ____43____(get) sick again in the future. Our best chances of avoiding sickness ____44____(be) by exercising and employing good _____45_____(habit). While good hygiene and exercise serve as obvious advice to most people, eating _____46_____(healthy) is not always obvious. If you cannot define “healthy”, then your immune system will be happy ____47____(tell) you. The immune system is the foundation of our health. It works for us every day to keep us well. Ask _____48_____(you): “Are you making its job easier ____49____ harder?” Like any system, the immune system is not different. It has a tolerance too. If you eat unhealthily, your immune system will make you aware of it. Take a step in the right direction ____50____  including some healthy food in your diet. 答案：41. an    42. illness    43. will get    44. are    45. habits    46. healthily    47. to tell    48. yourself       49. or    50. by

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