Deng Ziqi is very popular among teenagers.—Yes. Many middle school students are her .

My father gives me five hundred yuan a month which I think can________ all my expenses. [ ]

Scientists are convinced ______ thepositive effect of laughter ______ physical and mental health.

Zhang Liang was a cook years ago, but he______ a model over the years.

We are in the same class. ______ classroom is very nice.