题目

Over 70 percent of the double single-child couples in China need help from their parents in taking care of their own kids, according to a recent survey．Women of China magazine and a consulting company carried out a survey recently on young couples of the single-child generation, the Morning Post reports．The couples surveyed were around 29 and have been married for three years on average, with university education and monthly income of 4．000 yuan ($531)．Among them, 43．5 percent have kids． Results show that 71．9 percent of the young couples have help from their parents in －Do you have my passport, Janet? －Yes, I have ________ right here, in the locker． [　　] A．one B．it C．a very one D．this