一、单项填空(共15小题;每小题1分,满分15分)1. If you rank _______ second in the race, you’ll get _____ qualification to compete for the next round.
Scientists ____ thousands of chemicals before they decided on the right one in the end.
The deserted island is only _______ by boat.
As is widely acknowledged, a great number of traffic accidents ____ numerous deaths and countless property loss all over the world every year.
To their great _____, Tom’s problem proved not to be as serious as they had feared.
________ we had read your letter _____the true state of affairs.