汉武帝从匈奴手中夺去了（   ）       

小娟的父母经常私拆小娟的信件，为此，小娟感到非常苦恼。于是小娟采取了几种对策，你认为正确的有（   ）
①告诉父母这样做是违法的
②认真的和父母谈一谈自己的感受和看法
③寻求老师的帮助，做父母的思想工作
④不再和父母说话，以示抗争 

高空抛物现象曾被称为“悬在城市上空的痛”，这是一种不文明的行为，会带来很大的社会危害，这是因为处在高处的物体具有较大的（　　）

    We are learning English, but how can we learn English well? A student can know a lot about English, but maybe he can't speak English.

    If you want to know how to swim, you must get into the river. And if you want to be a football player, you must play football.

    So, you see, you can learn by using it. You must listen to your teacher in class. You must speak English to your classmates every day and also you must write something in English. Then one day you may find your English very good.