Helen is the most beautiful girl that I have ever seen.
Mr. Chang is the kindest teacher that I have ever had.
2.Nothing is more important than to receive education.
3.We cannot emphasize the importance of protecting our eyes too much.
4.There is no denying that the qualities of our living have gone from bad to worse.
5.It is universally acknowledged that trees are indispensable to us.
6.There is no doubt that our educational system leaves something to be desired.

a matter of 几(分钟，里路，块钱等)的事；大约，左右；是个…问题，事关…
about of 即将；打算
absent from 不在；缺席
absorbed in 吸引；专心于…
account for 说明(原因)；解释；占…
adhere to 粘附在…上；坚持，遵守；依附
adjust to 调整以适应
after all 还是；终于；毕竟
aim of 瞄准；致力于…；旨在
all but 几乎，差点；除…之外的全部
all the while 一直地；始终
all the more 更加越发
all the same 尽管如此，仍旧
allow for 酌量；考虑到
an

1.Have you heard the saying: what goes up must come down? Well what goes up and never goes down?

2.My thunder comes before my lightning. My lightning comes before my rain. My rain dries up all the land it touches. What am I?

3.You can see it, but you can't touch it. It may disappear, but has never really left you. It grows throughout the day. What is it?

4.What common