根据句意完成已给出首字母或汉语提示的单词，使补全后的句子意义通顺，语法正确。

1．Mr. Green likes traveling on a train because it is c    and cheap．

2．China is a very a     country that has a long history．

3．She is as                （活泼的）as a child．

4．Parents have to p               the children with food and clothes．

5．Notre Dame Cathedral is one of the famous c          in the world．

6．Shampoo can make your hair s                ．

7．The little white mouse is often used in the              （科学的）experiments．

8．People in Japan and America b           differently at the dinner table．

9．Pandas are e              animals．There aren't many of them left．

10．I'm still            （想知道）why you failed in the last exam．