In April, thousands of holidaymakers remained ________ abroad due to the volcanic ash cloud.
Never before in our country_____.
We wish______ no war and no poverty in the world.
Our school had about 20 notebook computers but only one-forth_____used regularly. Now we have 50 working all day long.
I can’t say which wine is best, it’s a(n)___ of personal taste.
It was in the lab___was taken charge of by our teacher____ they did the experiment.