51.Eggs, though nourishing, have ______ of fat content. 
a.        large number    b. a large number    c. a high amount    d. the high amount

52.He has done some ______ on that subject from various angles over the past ten years.
a.        research    b. a research    c. researches    d. the researches

53.Recently, he has lost all his ______. 
a.        wage and saving at card        c. wages and saving at card 
b.        wages and savings at card       d. wages and savings at cards

54.The country’s wealth comes chiefly from its many ______. 
a.        herd of cattle    b. heard of cattles    c. herds of cattle    d. herds of cattles 

55.In Britain the ______ are all painted red. 
a.        letter boxes    b. letters box    c. letters boxes    d. letters’s box

56.Ten years had passed. I found she had ______.
a.        a little white hair         c. a few white hair
b.        some white hair          d. much white hair

57.All his ______ far from satisfaction 
a.        conduct is    b. conduct are    c. conducts is    d. conducts will be 

58.Although the town had been attacked by the storm several times, ______ was done.
a.        a few damages    b. few damages    c. little damage    d. a little damage 59.He was ______ what to do. a.        at his wit end    b. at his wits end    c. at his wit’s end    d. at his wits’s end 60.Would you like to have a cup of tea and ______ with me? a two toasts    b. two pieces of toast   c. two piece of toasts    d. tow pieces of toasts 【答案解析】  CADCA  DACDB