依次填入下列各句横线处的词语，最恰当的一项是（　　）

①________4月5日，山西王家岭煤矿“3·28”矿难l53名被困人员中的115人成功获救，创造了中国救援史上的奇迹！

②中国举办世博会，________要向世界炫耀什么，________要交流先进科学技术，展示科技发展成果。

③敌人被打跑了，但战士们知道，他们不会善罢甘休。一定会________的。

    Many children like watching TV．It's very interesting and they can see a lot and know many things about other people．They can also learn from the radio．But they can learn easily with TV．Why? Because they can hear and watch at the same time．But they can't watch anything from the radio(收音机)．TV helps to open children's mind(思想)．They can find better ways to do things．

    Many children watch TV only on Saturday and Sunday nights．They are busy from Monday to Friday．But some children watch TV every night．They go to bed very late．It's not good for their eyes and health.

Listening is just as ______ as speaking in language learning. 

    My mother and I are in the shop(商店). We'll buy(买)some fruit. There are many apples, bananas, oranges, pears and watermelons. How much are they? Four yuan for a kilo(千克) of apples. Two yuan for a kilo of bananas. Three yuan for a kilo of oranges. Five yuan for a kilo of pears. One yuan for a kilo of watermelons. We'll take some.

专家建议青少年要多吃奶、蛋、鱼、肉等含蛋白质丰富的食品．主要是因为蛋白质是（　　）