1)must 2)mustn't 3)must 4)must5)must 6)mustn't
I am eight years old
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2.How often do you use your home phone ?
I use it very seldom.
3.Does your best friend often text you ?
Yes, he does. We are always in touch.
4.Do you often use the Internet?
Yes, I do . I spend much time surfing there.