NGA BRUSHES HER TEETH THREE TIMES A DAY.A. HOW LONG DOES NGA BRUSH...

20. Nga brushes her teeth three times a day.

A. How long does Nga brush her teeth ?

B. How often does Nga brush her teeth ?

C. How long does Nga brush her teeth ?

D. How does Nga brush her teeth ?

VI. Choose the best sentence ( A,B,C or D) for the mixing words (0,8m)