d. 还可以用by+倍数,表示增加多少倍。例如:
The production of grain has been increased by four times this year. 今年粮食产量增加了4倍。
2)分数表示法的构成:基数词代表分子,序数词代表分母。分子大于1时,分子的序数词用单数,分母序数词用复数。例如:
1/3
one-third; 3/37
three and three-sevenths.
1.______ martyrs have heroically laid down their lives for the people.
a. Thousand upon thousand of
b. Thousand and thousands of
c. Thousands upon thousands of
d. Thousand and thousand of
2.They received ______ of letters about their TV programs.
a. dozen
b. dozen and dozen
c score
d. dozens
3.Who is that man,______ in the front row?
a. one
b. the one
c. first
d. the first
4.We have produced ______ this year as we did in 1993.
a. as much cotton twice
b. as twice much cotton
c. much as twice cotton
d. twice as much cotton
5.The earth is about ______ as the moon.
a. as fifty time big
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