Scientists are convinced ________ the positive effect of laughter _______ physical and mental health.

I haven’t got the reference book yet, but I’ll have a test next month.— Don’t worry. You ________ have it by the end of this month. [ ]

Fortunately somebody who happenedto be passing by called the emergency aid thetraffic accident occurred

–Where can we park ___ car–Don’t worry There’s sure to be ____ parking lotnearby

This is Mr. White, _______ I think has something interesting to tell you.