higher this year than that of last year. 今年比去年的粮食产量增加了 8%。(4) 还可以用 by+ 倍数,表示增加多少倍。如: The production of grain has been increased by four times this year. 今年的粮食产量增加了 4倍。 2.分数表示法构成:基数词代表分子,序数词代表分母。分子大于 1时,分子的基数词用单数,分母的序数词用复数。如: 1/3(one third) ; 3/7(three sevenths) 。 Key : (1)B (2)D (3)B (4)D (5)B (6)B (7)D (8)A (9)C Practice 注意: 表示分数是,如果分子大于 1,分母用复数形式。 Unit puter and Why does puter e a problem for schools and parents? Question Because many bad things often happen to teens on the . Culture and Entertainment Unit puter and How do children deal with parents ’ monitoring? Question They always use code words to hide their online conversation from their parents. Review the new words Review the new phrases Review the important expressions Review the grammar point Self-test Unit puter and
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