请根据句意从方框中选择合适的动词，并用其适当时态填空，使句子通顺。
The water in the river _________dirtier if nothing is done.
When I visited her last night, she __________by the fire and thinking.
My father _________to Beijing for his business last night.
I’m a singer is the most popular programme that I so far.
The geography teacher told us that Diaoyu Island ___________ in the east of China.
将划线部分的英语译成汉语，注意使用适当的形式．
Building a beautiful countryside is what we hope for and what we'll work hard for．
将划线部分的英语译成汉语，注意使用适当的形式．
I like taking a walk in the bamboo forest because the air there is clean and fresh．
根据句意，用括号中所给词的适当形式填空，
To better understand the habits of elephants， the government spent a lot of money doing （科学研究）．
根据句意，用括号中所给词的适当形式填空，
I was feeling cold outside but warm inside， while the （北风） was blowing hard．
根据句意，用括号中所给词的适当形式填空，
Without an （身份证）， you can't go anywhere in today's world．
I agree． It's of great use．