11、 I have some difficulties __these words．Would you mind __ me your dictionary?
A． understanding, lending
B． to understand, to lend
C． to understand, lending
D． understanding, to lend
12、The largest meteorite on display is in the American museum in New York city over__________34 tons．{Page}


13、 The man said he would hit me __ I told him where the money was.
A． until
B． unless
C． soon after
D． as
14、It__________John and Kate who helped me the other day．
A． is    
B． was   
C． are    
D． were
15、 --There is nothing __ tomorrow afternoon, is there?
--No．We can have a game of table tennis.
A． on
B． in
C． out
D． up
16、Color—blind people often find it difficult to________ between blue and green．
A．divide
B．distinguish
C．separate
D．differ
17、 Not until I began to work __ how much time I had wasted．
A． didn't I realize
B． did I realize
C． I didn't realize
D． I realized
18、 If you want to book a round-trip ticket, you'll have to pay __ $30.
A． more
B． other
C． the other
D． another
19、It was your brother __ I met at the station.
A． who
B． whom
C． that
D． why
20、-- Have you ever played bridge?
-- Yes. We__________ on weekends when I was in college.
A． would have played                  
B． should have played    
C． used to play                        
D． had played

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