11、 In __ century, computers will be used more widely.
A． twenty-one
B． the twenty-one
C． twenty-first
D． the twenty-first
12、He was made __ his working because of his poor health.
A． to give up                    
B． given up         
C． give up                 
D． giving up 
13、 I will leave him a note __ he'll know where we are.
A． so that    
B． that           
C． in order      
D． for
14、 I have made a（n） __for my mother to see the dentist at 5 o'clock tomorrow.
A． interview 
B． appointment  
C． opportunity   
D． possibility
15、 We are happy __ we are not very rich.
A． however  
B． though        
C． but          
D． even if
16、Who is that man，    in the front row?
A． one   
B． the one   
C． first
D． the first
17、They stand __.
A． under the sun      
B． in the sun
C． over the sun        
D． against the sun
18、 Let me give you ~
A． advices           
B． some advice     
C． an advice          
D． the advice
19、 -- I saw Mary in the library yesterday.
-- You __.her, she is still in hospital.
A． mustn't have seen 
B． could not see      
C． can't have seen    
D． must not see
20、 The film was worth seeing．I regretted __ it.
A． to be missing      
B． having missed  
C． to miss           
D． to have missed

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