—Some English idioms are difficult to understand.—Exactly, ________ you know the meaning of each word.
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 .
. I was still sleeping when the fire______, and then it spread quickly.