1.We should try to keep the balance of nature
2.You are too rude, must apologize to your mother
3.The new road signs easy to recognize, on the very conspicuous
4.You'd better to disaster areas of the students, contribute clothing
5.Besides skill, careful outside is the key to success
6.The presence of all people should just comment
7.In some remote mountain area, some children because poor and had to drop out