The college entrance exam is ____ important to the student, and it’s also challenging. 

Medicine shouldn’t be kept where it is _____ to children.

The businessman offered a(n) __________ price for one of her collections, giving her a pleasant surprise. 

By now, when one makes a large purchase, he should have ___ opportunity to change his mind.

You can see the stars on a clear night, but in the daytime they are _____