My father keens on researching our family history.

问题描述:

My father keens on researching our family history.

家父热衷于研究我们家族的历史.We have a TV.(改为否定句)Put them on the desk.(改为否定句)She is flying for Paris (on Thursday).(用when对括号部分提问)We don't have a TV.Don't put them on the desk.When was she flying on Paris?