She is ____with her mother this afternoon

下列句中的词语解释全都正确的一项（ ）

My father and his teacher talked a lot about the things and persons ___ they could remember.

Now in China some young people ______ important positions in the government．

—Can I call you back at two o’clock this afternoon?—I’m sorry, but by then I______ to Beijing. How about five?[ ]