“Well done, John! Not a single mistake ________ in your exam paper this time!” said the teacher．

On my birthday, Kate gave me some flowers. The flowers ______ her ￥56.

Lisa, are you going to play ______ violin after school this afternoon? —No, and I’m going to play ______ chess with Tina.

The number of the students in our school is about nine ____. ____ of them are boys.—I think so.

To succeed in doing an experiment,________.