Not all the patents________ have been recognized.
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.
We spent hours driving and another few hours waiting, only _________ that the plane would be delayed until midnight.