“Isn’t it about time you _____ to do morning exercises?” “Yes, it is. Would you like to join us?”
Nobody in the class except you and me _____ to the principal about the air quality problems.
There is an increase of 16% in the consumption of tobacco_____ the previous year.
They are going to have the serviceman ____ an electric fan in the office tomorrow.
When he arrived, he found ____ the aged and the sick at home.
You cannot be ____ careful when you drive a car.