17.The physicist has made a discovery, ( )of great importance to the progress of science and technology.

286.She hired a lawyer to investigate, only to learn that Gabriel had removed her name from the deed. The infinitive verb phrase “only to learn” is to used ____________.

285.At ___________, photography is a chemical process, during which a light-sensitive material is altered when exposed to light.

284.Indeed, it is arguable that body shattering is the very point of football, as killing and maiming ____________.

283.I long to alleviate ___________, but I cannot.

282.She was once a young country wife with chickens in the backyard and a view of ___________ mountains behind the apple orchard.

281.He was lured into a crime he would not ___________ have committed.

280.U.S.News __________ rankings of colleges since 1983. They are a very popular resource for students looking to apply to a university campus.

279.The Bent Pyramid outside Cario __________ ancient Egypt’s first attempt to build a smooth-sided pyramid.

278.You must fire __________ incompetent assistant of yours.

277.At that moment, with the crowd watching me, I was not afraid in the ordinary sense, as I _________ if I __________ alone.