The police always take advantage of dogs’ ____ sense of smell to search for something.

Once he saw his daughter back safe, his ______disappeared.

Although the increase in the present sum used for the research is________， a great breakthrough could still be achieved by the end of this year.

Everybody said it was a perfect marriage; no one had ever known________couple.

My niece cares more for new clothes than anything else in the world, so she is very _______ about what she wears.