Landing safely in bad weather is a _______ task for any pilot, and even the smallest error can lead to a disaster.

The necklace the woman bought is          , because it is made of glass.

If you are _______ about Australian cities, just read the book written by Dr. Johnson.

—If not controlled, some terrible diseases will spread in the stricken areas after the terrible earthquake.—So people there are in _____ need of medical teams.

Everybody’s fingerprints are _______, so the police can easily find the thieves if any is left when they’re stealing.