Flu and measles are both caused _____ a virus.
He is longing _____ the day when he will be able to earn his own living.
Darwin said that people were related _____ monkeys.
The boy who got full marks was suspected _____ cheating.
I reminded her _____ her promise.
He recovered _____ his illness only last week.
We are looking forward _____ your visit _____ pleasure.
She complained _____ pains in her back.
He became addicted _____ drugs and went from worse _____ worse.
Vitamin D is essential ______ the growth of bones and teeth and is found _____ fish, liver, oil and milk.
