_____is your son? —He’s 12 years old. [ ]

Some organizations have been__________ to help the poor students in the western areas of China.

I made a promise to myself ________ this year, my first year in high school, would be different.

A computer is very popular and helpful .— I think so. It _______ in many different fields.

I had just started back for the house to change my clothes _____I heard my name called.