308. Bill is not a fast runner and he doesn't have a chance of winning the marathon, but he will _____ the race even if he finishes last.

　A. keep on B. keep to C. stick out D. stick to

307. The store had no more red shoes _____, so Mary chose brown ones instead.

　A. in demand B. in store C. in need D. in stock

306. Don't go too far into the sea, children, or the waves will _____ you off your feet.

　A. flow B. cut C. press D. sweep

305. He was _____ by a bee when he was collecting the honey.

　A. scratched B. pricked C. stung D. bitten

304. A landing on Mars is within the _____ of current physical theory.

　A. scheme B. scope C. scrap D. scale

303. You will get to the church more quickly if you take this _____ across the fields.

　A. track B. passage C. method D. journey

302. He gave me some very _____ advice on buying a house.

　A. precious B. worthy C. precise D. valuable

301. The writer was always looking for suitable _____ to use in his next story.

　A. contents B. articles C. notions D. ideas

300.[答案] C. immediately

　[注释] immediately(=directly) 作连词用，意为“一……就……”，相当于 as soon as .

299.[答案] D. prominent.[注释] prominent 突出的;突起的。indifferent 漠不关心的;permanent 永久 的;predominant 占优势的，主要的。