用所给单词的适当形式填空。．

小题1: —________ your father __________(fly) abroad yet?

—Yes, he has been in Singapore for a week.

小题2:Niushou Hill is an area of natural ______________ (beautiful) .

小题3:The men were clearing all the _____________(pollute) from the lake.

小题4:Xuzhou is one of the __________(north) cities in Jiangsu.

小题5:My brother__________(buy) some storybooks foe me just now. I like them very much.

小题6:The boy couldn’t stop ___________(laugh) after he heard the jokes.

小题7:Let’s use the computer __________(help) us do the homework..

小题8:This is the most interesting film I _______ ever________(see) in my life.

小题9:He spends as much time as he can ____________(learn) English every day.

第一次国共合作的党内合作方式的提出者是（）