The writer did not lern the truth untilher sister told ...
单项选择题The writer did not lern the truth untilher sister told herbout itB．her mother told heThe w
riter did not lern the truth untilher sister told herbout it B．her mother told herbout it C．her sister told her motherbout itA．her sister told her about itB．her mother told her about itC．her sister told her mother about it
