The city government decided to keep the old temple for its historical_____.

In this experiment, the famous professor showed three different____ to the study of physics．

Before Tom left home, his mother kept telling him to ________ his manners at the party.

I’m looking for an opportunity to display my _____ in advertising.

—Hello, I’d like to speak to Henry. —Oh, which _______? There are two ______ in our office.