The number of the students in our school isabout nine _____. —I see. ______of them are boys.

s worrying you, dear—Nothing I was just thinking about theproblem ______ tomorrow

____________ town it is !—Yes .Great changes have taken place here since we began to build a civilized（文明的）city .

It was such a difficult problem_______ few students in our class worked out

__surprised me most was to see some of the villagers ___ on the benches in the corner.