根据中文提示，用单词或短语的适当形式填空，完成句子。无论我们遇到什么困难，我们都应该试着笑对人生。
No matter what trouble we have，we should always try to________________.如果你想要成功，你得不断尝试，绝不放弃。
If you want to succeed，you should keep on trying and never _______________.他的电脑比我的便宜得多。
His computer is mine.直到现在，三聚氰胺仍然在一些食品中被发现，所以我们应该选定适合的方式来避免。
Up till now, Melamine has still been found in some food, so we must _____________suitable ways to prevent it .在你上交试卷之前，你最好再次仔细检查。
Before you hand in your examination papers, you had better ___________ again.
面对困难时如果你不放弃，你就应该为自己感到骄傲．
If you never give up when in trouble， you should be yourself．
Our school is going to （ 修建） a new library next month．
To sit （舒适地） ， passengers aren't supposed to eat or drink on the subway．
Thank you for giving me the useful （建议）to learn English．
The more you think about others， the more （有帮助的）you will be．