From the viewpoint of word formation, the word “ smog” is a ______.

Washing the food down with water as a substitute ________ chewing is not a good habit

He ________ his poor judgment ________ Jet Lag.

Police are ________ the disappearance of two children.

Each of us should _______ aside a few minutes to have a rest every day.

We were told that the stone figure _______ back to the 16th century was of great value.

Perseverance is a kind of quality and that is _______ it takes to do anything well.

You should help them ________ when your friends quarrel with each other.

We are interested in the weather because it _______ us so directly—what we wear, what we do and even how we feel.

—David has made great progress recently. — _______，and _______.