— You keep on coughing. What's the matter? — Oh, I've got a cold. Nothing serious, ____.
He is over sixty, but doesn’t look _____.
Why is it _____ he can’t get along well with his classmates?
Mary wrote an article on _____ the team had failed to win the game.
At last, we found ourselves in a pleasant ark with trees providing shade and _____ down to eat our picnic lunch.
_____ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns.