When it comes to second hand cars, one has to be as       as possible about the source and the condition of them.

From his________look，I could see that he didn’t believe what I said.

 My teacher is very nice. I’ll never forget the ______he has done for me.

Tom went to his teacher for ______ on how to work out the problem.

Since drug abusers have difficulty＿the addiction, support groups where they can talk about their struggles and find new ways to manage in the world are often needed.