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21．---Let me help you cross the street.
--- ! I’m not that old.
A．Take your time B．No way
C．Come on D．Go ahead
22．A big step to strengthen China’s health care systems since we launched an effort in 2008.
A．has been taken B．is being taken
C．was taken D．had been taken
23．Play, often seen as activity for kids, is still important in development of teenagers.
--- ! I’m not that old.
A．Take your time B．No way
C．Come on D．Go ahead
22．A big step to strengthen China’s health care systems since we launched an effort in 2008.
A．has been taken B．is being taken
C．was taken D．had been taken
23．Play, often seen as activity for kids, is still important in development of teenagers.
