英语翻译 急！不要百度翻译

The new star was discovered by a Chinese scientist.
He provided us a useful information.
please give me two bottles of milk at once.
You'd better not to play football on The street.
had he been arranged to Tibet for work yet?
big progress Has been made on The education.
do not laugh at The people who are in trouble.
would you mind I closing The Window?
he wrote his parent's a letter after he finished The homework.
he finished The book for three weeks.
望采纳谢谢

21 This new star was discovered by a Chinese scientist.
22 He gave us a piece of important news.
23 Please bring me two bottles of mik immediately.
24 You had better not play football in the street.
25 Has he been appointed to work in Tibet?
26 Great achievements in education have been made.
27 Don't laugh at those in trouble.
28 Would you mind my closing the window?
29 Having finished homework, he wrote a letter to his parents.
30 He spents three weeks finishing reading this book.