练习册

  • 练习册
  • 试题
    精英家教网 > 初中英语 > 题目详情

    It's a serious problem．We can't decide ________ Mr Harris comes back．

    [　　]

    A．while

    B．since

    C．until

    D．so

    答案：C
    练习册系列答案
    年级 高中课程 年级 初中课程
    高一 高一免费课程推荐！ 初一 初一免费课程推荐！
    高二 高二免费课程推荐！ 初二 初二免费课程推荐！
    高三 高三免费课程推荐！ 初三 初三免费课程推荐！
    相关习题

    科目：初中英语 来源：同步题 题型：完形填空

    完形填空。    
         The most well-known effect of weather    1    mood is a medical condition called Seasonal Affective
    Disorder (SAD for short).People who    2    from SAD get very   3     and depressed during the winter
    months. Actually it is    4   to do with the weather-more because during the winter, days are very    5    
    and people don't see so much day light(especially if they spend most of the day in a school room or of
    fice!). Of course, the further North of the equator you live, the   6 _    the days during winter and the
    more   7     you are to have symptom of SAD.
         When you are   8     to sunlight, your body makes lots of Vitamin D3, and because of that you make
    more of a substance called Serotonin  ( pronounced Ser- ah - TONE- in).Serotonin is a chemical   9     
    in the brain and it's very   10    to your mood. We know that if you don't have enough of it then you can
    become depressed-antidepressant drugs like Prozac work because they    11    the amount of serotonin
      12    to the brain. Scientists think that some people aren't so   13  _ at making their own serotonin, and
    need more sunlight than other people to do it properly. These are the people who suffer from SAD
    during the winter,
     14     they just can't get enough sunlight ouring the short days to make all the serotonin they need to 
      15     happy. This is probably down to their genes.
    (     )1. A. to        
    (     )2. A. get        
    (     )3. A. tired      
    (     )4. A.many        
    (     )5. A.long        
    (     )6. A. shorter    
    (     )7. A. possibility
    (     )8. A. closed    
    (     )9. A. found      
    (     )10. A. necessary
    (     )11. A.cause      
    (     )12. A. way      
    (     )13. A. good      
    (     )14. A. so        
    (     )15. A. become        		 B. on      
    B. come    
    B. sad      
    B. much    
    B. short    
    B. longer  
    B. chance  
    B. exposed  
    B. invented
    B. useful  
    B. improve  
    B. available
    B. best    
    B. but      
    B. feel         		C. of        
    C. suffer    
    C. excited    
    C. few        
    C. cold      
    C. smaller    
    C. opportunity
    C. explored  
    C. discovered
    C. important  
    C. produce    
    C. key        
    C. better    
    C. and        
    C. stay           		D. in          
    D. get away    
    D. disappointed
    D. less        
    D. warm        
    D. more        
    D. likely      
    D. exposing    
    D. made        
    D. valuable    
    D. increase    
    D. point        
    D. skillful    
    D. because      
    D. turn        

    查看答案和解析>>

    同步练习册答案