Her parents wouldn’t let her marry anyone ______ family was poor .
Last Monday the teachers and students held a grand ceremony __________ the 80th anniversary of our school.
Driving a car is not as difficult as you imagine, if you __________ the rules.
A good idea __________ to me, and I quickly picked up the phone to tell Jack about it.
So suddenly __________ that people had no time to escape.
I happened __________ with him when he was hit by a stone.