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her finger to her lips as _____ for silence. A. an idea B. a markC. a sign D. a word【陷阱】容易誤選B?!痉治觥繎?yīng)選C,sign與mark的區(qū)別是:sign 的意思是“跡象”、“征兆”gestureormovement made with the hand, head, etc, used to give information, a mand, etc(用手或頭等做出示意動(dòng)作以傳遞信息或命令等),mark 的意思是 writtenorprinted symbolorfigure, line etc made as signor an indication of sth(書寫與印刷的符號或圖、線等記號)。根據(jù)此二詞的語義區(qū)別以及常識可知答案為C。類似地,下面兩題的答案也是C: (1) Those black clouds are a sure _____ that it’s going to rain. A. thing B. markC. sign D. one(2) Just as a famous Chinese saying goes, a timely heavy snow is a ______ of good harvest next year. A. mark B. trackC. sign D. appearance但是,下面一題卻不能選sign,也不能選mark,而選symbol(象征):The lion is considered the king of the forest as it is a(n) _____ of courage and power. A. example B. signC. mark D. symbol順便說一句,在近幾年的高考中像這類結(jié)合詞義區(qū)別以及語境和生活常識進(jìn)行考查的試題經(jīng)常出現(xiàn),同學(xué)們需引起注意。9. “May I take your order now?” “We’d like three black _______ and two green _______.”A. coffee, cups of teas B. coffees, teasC. cups of coffee, tea D. cup of coffees, teas【陷阱】誤選C,認(rèn)為coffee和tea均為不可數(shù)名詞,不能后加復(fù)數(shù)詞尾s,從而排除選項(xiàng)A、B、D?!痉治觥窟xB。有的同學(xué)認(rèn)為 coffee 和tea是物質(zhì)名詞,不可數(shù),不能用 three coffees, two teas 這樣的表達(dá)。其實(shí),coffee既可用作不可數(shù)名詞,表示“咖啡”這種物質(zhì),也可用作可數(shù)名詞,表示“一杯咖啡”,即在口語中 three coffees 就等于 three cups of coffee。同樣,“三杯茶”既可說成 three cups of tea,也可說成 three teas;“三杯啤酒”既可說成 three glasses of beer,也可說成 three beers。10. _____ is a good form of exercise for both young and old.A. Walk B. WalkingC. The walk D. To walk【陷阱】容易誤選A或D。【分析】最佳答案為B。分析如下:(1) 首先,選項(xiàng)D不如選項(xiàng)B佳,因?yàn)?,不定式通常表示特定的?dòng)作,而動(dòng)名詞才表示習(xí)慣性的動(dòng)作。(2) 盡管walk用作名詞時(shí)可以表示“散步”,但它是可數(shù)名詞,指的是一次一次的具體的散步,而不表示抽象意義或泛指意義的“散步”,要表示此義,要用動(dòng)名詞 walking。比較:How about going for a walk? 出去散散步如何?Walking does good to your health. 散步對你的健康有益。類似地,dance 和 dancing 以及 swim 和 swimming 的區(qū)別也是一樣:(1) 名詞的 dance表示“跳舞”,是可數(shù)名詞,指的是一次一次的具體的跳舞,而不表示抽象意義或泛指意義的“跳舞”,要表示后者的意思,要用動(dòng)名詞轉(zhuǎn)化來的名詞 dancing。比較:Let’s have a dance. 我們跳曲舞吧。He is interested in dancing. 他對跳舞感興趣。(2) 名詞的 swim表示“游泳”,是可數(shù)名詞,指的是一次一次的具體的游泳,而不表示抽象意義或泛指意義的“游泳”,要表示后者的意思,要用動(dòng)名詞轉(zhuǎn)化來的名詞 swimming。比較:She had a swim every day. 她每天游一會兒泳。She loves swimm