37.According to the school rules, no child _______ be allowed out of the school during the day, unless accompanied by an adult.
A. will
B. would C. might D. shall
【解析】考查情态动词特殊用法。Shall用于所有人称,表示命令,允诺,强制,(法律法规)要做某事;本题就是规定中要做的事情。句意:根据学校规则,没有学生可以在白天外出,除非有成年人陪同,故D正确。
38.It was not until 1911, _______ the first vitamin was identified, _______ people realized the importance of it.
A. when; which B. when; that C. that; which D. that; that
【解析】考查定语从句和强调句型。定语从句When the first vitamin was identified修饰先行词1911,因为句子很完整,使用关系副词when.第二空与it was构成强调句型。句意:正是知道第一批维他命被识别出来的1911年,人们才意识到它的重要性。故B正确。
39.We’ve just heard a warning on the radio _______ a typhoon may be on its way.
A. what B. when C. which D. that
【解析】考查同位语从句。同位语从句that a typhoon may be on its way对名词warning进行解释,说明该名词的内容。That在句中起引导作用,满意任何意思,不能省略。
40.Traditional Chinese medicine is thousands of years old and has developed _______ time.
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