The companies are working together to creat ______ they hope will be the best means of transport in the 21st century.
As I grew up in a small town at the foot of a mountain, the visit to the village _____ scenes of my childhood.
When it comes to my preference for entertainment in the spare time, I prefer gardening to parachuting, because the latter is a dangerous _____.
The reason why the government decided to put off the plans to build a new airport was that the plan met with fierce _____ from local farmers.
Having signed the agreement on the ceasefire, both sides have _____ it. In other words, neither of the two sides have broken the agreement so far.
As there is less coal and oil, scientists are exploring new ways of making use of _____ energy, such as sunlight, wind, and water for power and fuel.