The astronaut did many experiments in the spaceship, ______ much help for knowing space.
With more forests destroyed, a huge amount of good earth ____ each year.
Men and adults under 30 are more __________ to have digital music players.
---- My pan has disappeared from the table. ---- You _____ it in the wrong place.
Twenty men fell into the water and were _____ by other boats. As a result, they missed the fighting on the beach.
Millions are suffering from the severe drought in the southwest of our country, where people are badly _____ water.