My grandfather doesn't know               to use a computer.

—I suppose he’ll pass the exam, _______________?   —Of  course he will.

—Remember not to pretend to know what you don’t know.— _____. My last lesson is still fresh.

— ______ do you have the drawing lessons? The pictures you draw are so beautiful.— Once a week. I began having drawing lessons at the age of five.

---______ do you exercise? ---Once a week.