---Would you like to go to see the film with us?---Thanks, but I ____it already.
________ anything like this style of architecture before, we thought we were looking at giant sculptures, not buildings.
Whenever Steve sang in the shower, his voice _______ throughout the house.
The government is aiming to reduce the unemployment, but it’s quite _______ to have a job at all these days.
Most experts agree that human activities such as the clearing of large areas of forests, and farming on a large scale _________ the problem of global warming.
With the help of the collected money, subways can be built sooner and better, _______ brings convenience to citizens.