用所给单词的适当形式填空1.The ____(siuation) of the air pollution(污染) is

用所给单词的适当形式填空
1.The ____(siuation) of the air pollution(污染) is becoming very serious.
2.There is a long way ____(finish) the work for you.Come on!
3.---What can we do ____(help) the sick(生病的) boy?
---Why not tell a story to him?
4.My father is very happy because his ____(research) have been successful.
5.Little Kate ____(feed) the dog three times every day.