20．The life of a high school student is usually active，exciting and full of fun，but it      be stressful sometimes．（　　）
A．mustB．canC．needD．should

分析 高中生的生活通常充滿活力，令人激動(dòng)并且充滿樂趣，但有時(shí)也可能會(huì)有壓力．

解答 答案：B
題干中usually通常，sometimes有時(shí)，表示對(duì)比；must一定，can可能，need需要，should應(yīng)該；句意表達(dá)的是有時(shí)可能也會(huì)有壓力，表示不肯定的推測(cè)．故選B．

點(diǎn)評(píng) 情態(tài)動(dòng)詞的用法是英語中�？嫉恼Z言點(diǎn)．通�？疾榈姆绞接刑摂M和推測(cè)，本題考查的是情態(tài)動(dòng)詞的推測(cè)用法．學(xué)習(xí)時(shí)要注意積累．

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