Ourteachers always make us ________ a lot of homework.

If the car you rent is not satisfactory, you can always ________ it for another.

Childrenunder six are not ______to school except those of extraordinary intelligence

He ______ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.

Many people in Pompeii were buried __________, __________was the city. How unfortunate!