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    科目： 来源：专项题 题型：单选题

     Leave your key with your neighbor ________ you lock yourself out one day.
    [     ]
    A. as long as  
    B. even though
    C. in case  
    D. as if

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    科目： 来源：专项题 题型：单选题

    Once ________ in the forest, you ought to remain ________ you are waiting for help.
     [     ]
    A.losing; where   
    B. losing; there
    C. lost; there    
    D. lost; where

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    科目： 来源：专项题 题型：单选题

    — You look unhappy, my son?
    — I'm wondering how long it'll be ________ we come to China again.
    [     ]
    A. since  
    B. when
    C. before  
    D. after

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    科目： 来源：专项题 题型：单选题

    — Why didn't you chat with that friendly foreigner just now?   
    —  I'd like to, but the trouble was ________ he said was difficult for me to understand.
    [     ]
    A. what which      
    B. that what        
    C. that that      
    D. what that

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    科目： 来源：专项题 题型：单选题

    It suddenly occurred to him________ he had left his keys in the office.        
    [     ]
    A. whether          
    B. where            
    C. which              
    D. that

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    科目： 来源：专项题 题型：单选题

    The limits of a person's intelligence, generally speaking, are fixed at birth, but ________ he reaches these
    limits will depend on his environment.
    [     ]
    A. where  
    B. whether
    C. that  
    D. why

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    科目： 来源：专项题 题型：单选题

    Jerry did not regret giving the comment but felt ________ he could have expressed it differently.
    [     ]
    A. why  
    B. how
    C. that  
    D. whether

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    科目： 来源：专项题 题型：单选题

    Everyone in the village is very friendly. It doesn't matter  ________ you have lived there for a short or
    a long time.
    [      ]
    A. why            
    B. how         
    C. whether        
    D. when

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    科目： 来源：专项题 题型：单选题

    It doesn't matter ________  you pay by cash or credit card in this store .
     [     ]
    A. how  
    B. whether
    C. what  
    D. why

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    科目： 来源：专项题 题型：单选题

    It doesn't matter ________ you turn right or left at the crossing-both roads lead to the park.
    [      ]
    A. whether  
    B. how 
    C. if  
    D. when

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