B 表示过去可能发生而实际上未发生的事.用might+动词完成式.若只是推测过去可能的事.则可用 may [might] + 动词完成式.如 He may [might] have gone. 他可能已经走了. 查看更多

 

题目列表(包括答案和解析)

阅读理解

供应大脑的正常血液量被切断后,人就会晕厥而不省人事,当人们被听到或看到所震惊时,就可能发生晕厥现象,针对不同的晕厥情况要采取不同的急救措施。

People faint when the normal blood supply to the brain is suddenly cut down. This can happen if they are surprised or shocked by sudden news or by something they see. Some people faint if they see others hurt. Some people faint in crowds. Others faint if they are in a room that is hot and stuffy.

If a person faints while standing, lay him down. If his face is pale, lift his feet. If he is sitting down when he faints, place his head between his knees. Loosen any tight clothing that might keep him from breathing easily. If possible, place a cold, wet cloth on his forehead.

We try to help a person who has fainted by _________.

A. tightening his muscles

B. rubbing his head

C. returning blood to his brain

D. holding him in an upright position

 

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阅读理解

供应大脑的正常血液量被切断后,人就会晕厥而不省人事,当人们被听到或看到所震惊时,就可能发生晕厥现象,针对不同的晕厥情况要采取不同的急救措施。

People faint when the normal blood supply to the brain is suddenly cut down. This can happen if they are surprised or shocked by sudden news or by something they see. Some people faint if they see others hurt. Some people faint in crowds. Others faint if they are in a room that is hot and stuffy.

If a person faints while standing, lay him down. If his face is pale, lift his feet. If he is sitting down when he faints, place his head between his knees. Loosen any tight clothing that might keep him from breathing easily. If possible, place a cold, wet cloth on his forehead.

We try to help a person who has fainted by _________.

A. tightening his muscles

B. rubbing his head

C. returning blood to his brain

D. holding him in an upright position

 

查看答案和解析>>

阅读下列各小题,根据句后的汉语提示,用句末括号内的英语单词完成句子,并将答案写在答题卡上的相应题号后。

71. Judging from the inspired look of the students, the headmaster________________ an inspiring speech. (deliver)

从学生们受到鼓舞的表情看,校长一定在做一场鼓舞人心的演讲。

72.   ____________________ is what to do next. (confuse)

最让我困惑的是下一步该做什么。

73.   A boy as well as his friends _____________ in the exam and punished by the school. (catch)

一个男孩和他的朋友们在考试中舞弊被抓并受到了学校的惩罚。

74. After the new technique was introduced ,the factory produced _____________ in 2012 as the year before. (many)

引进新科技后,这家工厂2012年生产的小汽车是前一年的两倍。

75.___________________ the student was admitted into a key university in Wuhan. (word)

消息传来,那位学生被一所重点大学录取。

76. When I entered the teacher’s office, I found Tom _______________his being late for school to her. (account)

当我走进老师的办公室时,我发现Tom在向她解释上学迟到的原因。

77. As she ______________________ reading the novel, the teacher came in. (focus)

她正集中注意力看小说时,老师进来了。

78. Only when the teacher explained the way to us a second time _________________ it. (hang)

当老师再次向我解释了这个方法后,我才掌握它。

79 . Be careful! Road accidents __________ happen on such snowy weather . (likely)

   当心些!这样的雪天更有可能发生交通事故。

80.   It is what you did rather than what you said____________________. (matter)

重要的是你所做的,而不是你所说的。

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as if和as though引导的从句所叙述的情况与事实相反时,从句的谓语动词多用虚拟语气。在虚拟语气结构中,用________时态来表示现在的情形;用________时来表示过去的动作或状态;用________时表示正在进行的动作;用________时表示将要发生的动作。

当as if和as though从句的主语和主句主语一致,且从句中含有系动词be的某种形式时该主语和系动词可以省略。

例如:John paused as if(he was)expecting Mary to speak.

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有一种人类中罕见的常染色体显性致病基因导致的疾病,在某海岛的人群中有很高的发病率。人类遗传学家在探讨该先天性疾病的高发病率成因时可能涉及到如下的哪种因素:


  1. A.
    该基因的突变率很高
  2. B.
    该海岛可能曾经发生过导致人类灾难的事件
  3. C.
    最初开发该海岛的少数移民
  4. D.
    该基因不受自然选择的作用

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