The thief ran away at the _____ of a policeman.
. In our class, when the bell rang and the teacher closed his book, it was a______for everyone to stand up.
Now, in our country free medical treatment covers sickness of mind as well as ______sickness. A. ordinary B. average C. regular D. normal
The biggest whale is ______ blue whale, which grows to be about 29 meters long—the height of ______ 9-story building.
— You should apologize to her, Barry. —______, but it’s not going to be easy.
Gun control is a subject______Americans have argued for a long time .