4.答案:a KFC in the park解析:他们在哪里吃午餐?他们在吃午餐。根据文中“At 12:00,they have lunch in a KFC inthe park.在12:00,他们在公园里的一家肯德基吃午餐”可知他们在公园里的肯德基吃了午餐。故答案是a KFC in the park5.答案:Yes; they ;are解析:他们累但是开心吗?根据文中“T hey ar...