A:CH3﹣CH=CH2和CH3﹣CH2﹣CH=CH2
B:CH3﹣CH3和CH3﹣CH=CH2
C:CH3﹣CH2﹣CH3和CH3﹣CH=CH2
D:CH3﹣CH2﹣CH2﹣CH3和CH3﹣CH2﹣CHCl2
根据拼音写出相应词语
Our parents ____ ____ ____ ____ us every time we leave home.