单项选择题
A．how B．what C．when D．where
A．they were born in the city of Chengdu B．they were caught in Sichuan Province C．the USA paid $ 4 million to China D．three year’s discussion of the two cities
A．we should eat more fast food B．we should not eat too much fast food C．we should avoid any fast food D．we should not serve fast food