帮忙做一道英语短文改错题

帮忙做一道英语短文改错题
Quite a few of students visit net bars frequently.1._________
They went there mainly to play games.Some of 2._________
them sometimes sit in the net bars the whole night,3__________
which has very bad effects not only in their studies 4._______
but also on their healthy.So there is no doubt that 5________
it is good often staying in the net bars to students 6_______
I think us students should spend most of our 7._________
time work hard at our lessons and try our best 8._________
to go to universities to get more knowledges,so we 9________
can make contributions to our country in the future 10________