Scientists are convinced ________ the positive effectof laughter ________ physical and mental health

The small mountain village we spent our holiday last month lies in is now part of Hubei.

She said she didn’t take the money.— I ____ what she said because I _____her. [ ]

I hope _______ the stationery with those children from poor areas.

No words can ____ his feelings when the money dropping on the street was sent back to him.