—Jack bought a new mobile phone the other day.—_______?That’s his third one in just one month.

Something has to be done to stop the rivers from being further polluted,       ?

—I would like to pick up your sister for you. But I don’t know her. _____?—A middle-aged woman with a round face, wearing a red blouse.

—The street is too bad，isn’t it?—_______,_______it’s a bit too crowded.

 ---         students are there in your class?--- Thirty-five.