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1.[考点解析]时间介词。in表示在某年、某季度、某月、某周、一天中某段时间。如：in 1999，in spring，in February，2002，in a week，in the evening. on表示某一天或某天中的某段时间。如：on Sunday，on the morning of May 1， on March 8，on a cold spring morning. at表示某个具体的时刻。如：at eight oclock，at this time of year，at the moment，at the same time. 注意有些表示时间的词语前如有last，next或this，则一般不用介词，如：last night/week/month/term/Sunday/Monday? next week/month/term? this year/week/month/term//Sunday/Monday? the next day/week/month/term/year. [真题再现] the evening of May 31?the 2002 FIFA World Cup started in South Korea. (北京海淀2002) A. On B. At C. Of D. In China became a WTO member December 11th?2001. (北京崇文2002) A. in B. at C. of D. on ________a cold morning?I opened the window and was glad to find that it was snowing outside. (北京东城2002) A. By B. In C. At D. On 2.[考点解析]可数名词和不可数名词。 注意：当不可数名词用在数词+单位词+of结构时，如果数词和单位词是复数形式，后面的不可数名词也不能加-s或-es。如：two bottles of water?many glasses of milk?etc. | 
