【2014年内蒙古包头市、乌兰察布市中考】
从下面方框中选择一个适当的词填空，并将其正确形式写在答题卡对应位置，每空一个词。每词只用一次。

offer     walk     valuable      big      discover forget     harmful    important    exactly     watch

 
Eric spends half an hour      TV every evening.
My brother didn' t realize the     of English until he began to work in a Canadian factory.
She     where she parked her car yesterday, so it took her a long time to find it.
Every day after supper, my father      his dog in the park.
Smoking is      to your health, so you'd better give it up.
The house is      the same as it was 20 years ago.
This T-shirt is kind of small. Can you show me a      one?
Our teacher gave us some      advice on how to learn English well
The strueture(结构)of DNA was one of the most important     in the twentieth century.
He said he would drive rne home, but I turned down his     .