题目内容
8.It's necessary ___________ us _____________ more trees in spring every year.( )| A. | of; to plant | B. | for; to plant | C. | of; planting | D. | for; planting |
分析 对我们来说,每年春天种更多的树是必要的.
解答 答案:B.根据题干可知,本句中使用的句型是It is+形容词+for/of sb.to do sth.,根据若形容词是描述不定式行为者的性格、品质的,如kind,good,nice时,用of;若形容词仅仅是描述事物,不是对不定式行为者的品格进行评价,如,important、easy、necessary等,用for可知,本句中的形容词necessary是描述事物的词,故用for.根据是固定句型,应用to plant.故选B.
点评 本题考查介词的应用,做题时比较容易根据通常用法进行选择,故做题时注意区分,特别是一些特殊用法.
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