21．----Can you come for dinner on Sunday or Saturday?
----I’m afraid ______ is possible.
A．either B．neither C．some D．any
22．Vladimir Putin made ______ decision that he would not run for president ______ third time.
A．a; the B．the; the C．a; a D．/; the
23．He was about to tell me the secret_______ someone patted him on the shoulder.
A．as B．until C．while D．when
24．----How did you think of the job he did yesterday?
----Well done. _______.
A．It couldn’t be worse B．It should be better
C．It was worse D．It couldn’t be better
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