In April,thousands of holidaymakers remained________abroad due to the volcanic ash cloud.
Tony, mind your manners. Don’t _______ while others are talking.
The companies are working together to create they hope will be the best means of transport in the 21st century.
The hotel wasn’t particularly good. But I ____ in many worse hotels. A .was staying B, stayed C. would stay D. had stayed
Scientists are trying to develop a special material, _______ they will make use of in space.
The education of _______young is always _______ hot and serious topic in modern society.