题目内容
4. the situation become worse,call me at once.( )A. | Must | B. | Need | C. | May | D. | Should |
分析 如果情况变得更糟,立刻打电话给我.
解答 答案:D must"必须","禁止","不准","必定","偏要";need"需要";may"可以".should 作为情态动词,可以用在条件状语从句中,表示语气较强的假设,译作"万一",这时也可将 should 置于从句之首.根据句意,如果情况变得更糟,立刻打电话给我.缺少"如果,万一",所以选D.
点评 考查情态动词用法.平时注意积累情态动词的特殊用法.
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