I always think it was such a(n) ______ for me to have spent a day with kids in the Children’s Home.

I didn’t know it could do terrible ______to your heart and lungs or ______was more difficult for smoking couples to become pregnant.

The farmers suffered a heavy ________because of the terrible storm.

 There existed an obvious________ between the accounts of the witnesses, so a judgment was not announced in court.

Nowadays senior high students are burdened with too many        ，which is making them less and less confident.