21．I sent a big bunch of flowers to the nurse as an of thanks for her taking good care of my grandpa in the nursing home.
A．attitude B．impression C．appreciation D．expression
22．Shelly had prepared carefully for her biology examination so that she could be sure of passing it at her first .
A．intention B．effort C．attempt D．sight
23．Don’t blame them any more-this is because they are still young and lack experience.
A．exactly B．simply C．eventually D．generally
