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（2014重庆一中高三下第三次月考）4. —Why! I couldn’t get you on the phone yesterday afternoon?—We _____ kites in the yard when you phoned.

With real estate （房地产）______ in economy, a lot of rich farmland had to ______ new houses and offices in the area.

How long do you think it is _____ he took up the job?— Half a year at least[ ]

Is this your eraser —No, it isn’t______. I think it’s______.