（ ） the past year as an exchange student in Hong Kong, Linda appears more mature than those of her age.

When we arrived at the airport, we were told our flight （ ）.

（ ） when she started complaining.

When Mary paid the bill, she was given a _____ for her money.

When he awoke, he found himself _____ after by an old woman.

Fresh air, enough exercise and nutritious food （ ） to good health.

It （ ） that the jewels had been stolen by a traveler.

The quality of education in this small school is better than _____ in some larger schools.

I can’t find my keys! Can you help me （ ） them?

I stayed up all night _____ to find a new solution to the problem.

The kidney transplant operation was _____ complicated, so the operating team had to take special care to ensure its success.

It’s vital that enough money_____collected to get the project started.