We don't （be not sure if something is true）the great achievements China has made in the past 40 years．
As you set out on your new journey，you shouldn't forget where you came from．
The most valuable thing is time，rather than money．
I （相信）that a better environment can be created in Binzhou and we should work together to make it come true．
In my hometown，there was a big old tree （在…对面）our school．
A true friend your hand and touches your heart．（一个真正的朋友是在需要时给你帮助，使你感动．）