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) .

《沙尘暴印象》走路蒙着眼，吃饭捂住碗，对面看不见，衣服不用染。这给我们的启示是

①目前我国环境问题仍十分严重，应加大治理力度

②沙尘暴给人们带来严重的危害

③环境问题给人们的生活带来严重的影响

④我国应先退耕还林、还草，然后再去发展经济

A．①②③

B．②③④

C．①②④

D．①②③④