Upon reaching an/a ______ age, children are encouraged, but not forced, to “leave the nest”.
He threw away all the ______ cigarettes, _______ to give up smoking for the sake of his health.
Mandy, ___ university student from Canada, teaches us ___ history of western art.
He always works hard, but__________, he didn't pass the exam.
The book_______well.
On _______ side of the river there are a lot of trees.