翻译句子（共5小题，每小题4分，满分20分）

小题1:If your friends get tired of school life and feel upset, you should offer them guidance and help when necessary.

小题2:As we all know, it is worthwhile for high school students to take part in club/society actities and serve as volunteers regularly.

小题3:Travel, an important part of life, can not only help us release pressure from work and study but also reward us with unforgettable memories.

小题4:Four years ago， Lewis failed to reach the required standard. However, he didn’t lose heart. Finally, he was admitted as one competitor in London Olympics.

小题5:It is our responsibility to protect these cultural relics. Therefore, no tourists are allowed to take photos, speak loudly or touch the exhibits.