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21 .- Which one of these do you want?
    -_______Either will do.
A. I don't mind     B. I'm sure
C. No problem       D. Go ahead
22. Sarah looked at         finished painting with         satisfaction.
A.不填; a
B. a; the
C. the;不填
D. the; a
23. "Life is like walking in the snow", Granny used to say, "because every step            
A. has shown
B. is showing
C. shows
D. showed
24. It is by no means clear       the president can do to end the strike.
A. how           B. which          G that           D. what

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