题目内容
13.---It's reported that vaccines(疫苗) for H7N9bird flu may hit the market as early as May.---Really?If so,we _____ depend on those from abroad.( )
| A. | mustn't | B. | can't | C. | shouldn't | D. | needn't |
分析 --据报道,H7N9禽流感疫苗可能最早会在5月投放市场.
--真的吗?如果这样的话,我们就不必依赖那些从国外进口的疫苗了.
解答 答案:D.根据It's reported that vaccines(疫苗) for H7N9bird flu may hit the market as early as May,可知H7N9禽流感疫苗可能最早会在5月投放市场,所以我们就不必依赖那些从国外进口的疫苗了.needn't不必.故选D.
点评 本题考查了情态动词的用法.熟知句意是解答本题的关键.
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