——_____________ does she weigh?     ——Her ______________ is 50kg.

—Does she speak Chinese? 
—No, she ____. She speaks English.

---         does she do on weekends?
--- She usually helps her mother.

---_____ does she chat with friends on the Internet?
--- Once a week.

— Does she often get to school ____________ bus?

—Yes, quite often.

A. by          B. on          C. for         D. with