昨天下午放学的时候天正下着大雪.(snow)
when school was over yesterday afternoon.
We are supposed to (鼓励)the young to read more books.
Keeping an English diary can help us improve our writing (能力).
This is the (第八) year for Jim Green to stay in China.
The plane flew at a (高度) of three thousand meters.
It's necessary for us to (等待) in line in public.