At the meeting they discussed three different _______ to the study of radioactive waste.

The window of our room can give us a good view of the street, in which case we witnessed the accident as if we were at the _____.

Although I liked the appearance of the house, what really made me decide to buy it was the beautiful________ through the windows.

The purpose of the campaign is to raise the public’s_______ of the dangers of passive smoking.

To save some of the human languages before they are forgotten, the students in our school started a discussion “Save Our _________”