14.As we all know, it takes ten years to grow trees but a hundred to rear people, which means it will be ________ one becomes a useful person.
—Why is Tom absent? —He must be sick,__________?
I don’t think he could have done such a stupid thing last night,__________?
Mrs.Black doesn’t believe so many people are suffering from this tsunami,__________?
If you want to learn about Liu Xiang,let me know,__________you?
About 60 percent of the students __________from the south; the rest of them __________from the north and foreign countries.