E.There are many other expressions waiting for you to explore. F.That means many people are competing for the same things, like good jobs. G.They take their dogs for walks, let them play outside and give them good food and medical care. 第2题的答案为F。由设空处后两句不难发现,前一句中出现斜体字work like a dog,后一句是对前一句的解释、说明,由此可以判断出,设空处的前一句中出现斜体字a dog-eat-dog world,设空处也应是对前一句的解释,因此F项符合语境。