An unhappy childhood may have some negative effects on a person’s characters; however, they are not always_________,

—Are train services now back to ______after last week's snowstorm?—Yes，they are.

---John always thinks of others instead of himself ---So he does. It is_____of him to want to help others

—Would you like _______ , sir?    —No, thanks. I have had much.

 Learning from _______ mistakes can help us stay cautious and make wise decisions in the days to come.