51.Where have you been these days 【解析】由Paul的回答“rye been to France for my holi-days．”可知答案应是“Where have you been these days”。 

52.How were your holidays 【解析】Paul又回答“Very exciting．”(玩得很开心。)所以Jim应问“How were your holidays”。

53.I've been to France twice 【解析]Jim说：“你很幸运，我从没去过国外。”根据汉语提示可知Paul已去过法国两次，所以答案为“I've been to France twice”。 

54.How long were you there 【解析】下句Paul说：“我待了将近两周。”所以Jim应问“How long were you there”。 

55.I think my French has improved a lot 【解析]Jim问Paul是不是一直讲法语。根据汉语提示可知，Paul认为他的法语进步很快，所以应填“I think my French has improved a lot”。