In our city there is a big zoo. There are a lot of different animals in it. There are some scary（可怕的） tigers and lions. They like eating meat and they eat much meat every day.

    There are also two big elephants and a baby one. Children like to ride(骑) one of them. The elephants are very kind and friendly. They eat much grass and bananas.

    In the zoo, we can see different kinds of bears, black bears and white bears. They are heavy(沉重的) . They are all slow and clumsy . They stand on their back legs and lift their front legs to ask for food. They like cakes very much.

    Do you like pandas? There's only one in the zoo. Her name is Huahua . She is very cute. She likes eating bamboo a lot. She is kind of shy. She's very interesting and lovely.

纪录片《大国崛起》中有这样一段解说词：“公元1500年前后的地理大发现，拉开了不同国家的相互对话和相互竞争的历史大幕。”“地理大发现”是通过下列什么活动实现的(　　)

He runs fastest in his class.            runs faster than him in his class.