Teachers _ wear tie because wearing tie makes them uncomfortable.ġ0. You _ brush your teeth twice a day to keep them white and healthy.ĩ. If you find the questions hard you _ study harder.Ĩ. If it is cold outside, students _ play inside.ħ. He _ take those pills without asking his doctor.Ħ. You _ be more careful when you do your homework. You _ drink more water instead of fizzy drinks.