1.Bad habits can______.(导致疾病）
2.Waliking is good exercise and it is_______(必要的）for good health.
3.We are germs, we can get into the human body______（通过）the nose.
1.Bad habits can_lead to disease._____.(导致疾病）2.Waliking is good exercise and it is_necessary______(必要的）for good health.3.We are germs, we can get into the human body__by____（通过）the nose. 希望能够帮到楼主
