4、ientists think that itwill take____of years to make robots do mostwork for humans.A.hundreds B hundred C.thousand【解析】本题考查数词用法。hundreds of意为“数以百计的”,为固定搭配。故选A。本题难度较小。【答案】A【例2](2011,湖南邵阳)一 trees were cutdown And many birds lost their home. .A.Two thousands B.Thousands of C.Thousand
5、of【解析】当hundred,thousand,million表示模糊数字时,其后加s,并接of。表示具体数字时,其后不加s,也不接of。thousands of意为“成千上万的,数以千记的”。故选B项。A项中的正确形式应为Two thousand。【答案】B 【知识拓展】表示数字时,hundred不用复数,而且百位数与十位数之间用and,十位数和个位数之间要用连字符“一”。【例3】(2011,山东滨州)Now,everybody,please turn to Page____and look at the____picture.A. Fifth; five B Fi
7、twenty-one twenty-five06:00读作:zero six hundred hours12小时制时刻的读法分为顺读法和倒读法。顺读法是依次读“点钟数、分钟数”。倒读法中,在前半小时:“分钟数+past+已过钟点”;在后半小时:“分钟+to+下一个点钟数”。半小时用half,一刻钟用quarter。6:00读作:six (o'clock)7:30顺读:seven thirty倒读:half past seven9:15顺读:nine fifteen倒读:a quarter past ni