1. (2018八上·浙江期中) 请用方框内所给单词的适当形式填空，使句子通顺、正确。每词仅用一次

against      nature       billion        feed       careful

1. （1） For every person, it is so to forget English words that we should keep practising and using them more often.
3. （2） A few days ago, the great Chinese actor Chow Yun Fat said that he would give as much as 5.6 dollars to help the poor.
5. （3） According to a recent research, more and more people in the US show that they are the Trump government.
7. （4） Her teachers are worried that she is always at her schoolwork in the class than the other students.
9. （5） When we came over to my grandparents' farm, they their farm amimals.