经济运行具有周期性，股票市场行情作为经济的晴雨表，总是同步反映经济周期的变化。( )

用所给单词的适当形式填空

1. He showed ______ (interest)in English last year. And he is______  ( interest) in English now.

2. The students feel very _______ ( excite) at the______   ( excite) leavers' party.  

3. A knife is _______ ( use) when you travel in the forest.

4. Sunday is the _______ ( one) day of the week.

5. We can never pay you back for your _______  ( kind) .