用所给单词的适当形式填空。．
—________ your father __________(fly) abroad yet?
—Yes, he has been in Singapore for a week.
Niushou Hill is an area of natural ______________ (beautiful) .
The men were clearing all the _____________(pollute) from the lake.
Xuzhou is one of the __________(north) cities in Jiangsu.
My brother__________(buy) some storybooks foe me just now. I like them very much.
The boy couldn’t stop ___________(laugh) after he heard the jokes.
Let’s use the computer __________(help) us do the homework..
This is the most interesting film I _______ ever________(see) in my life.
He spends as much time as he can ____________(learn) English every day.