In the past, many rivers were seriously, but now they are cleaned up. (污染)
Let life be beautiful like summer flowers and death like autumn .(树叶)
Andrew is clever and hard﹣working.He often works out some problems very e .
We are going to study in a new school in .(九月)
The secretary isn' t able to (翻译) this business letter into French.
自我开始学英语以来,我结识了很多外国朋友.
I have made many foreign friends I leaning English.
作此决定并非偶然,对此我已思虑多时。
The decision and I'd thought about it for long.
When watching the raising of the national flag,we should stand with our backs.
放学后你能帮我打扫教室卫生吗?
Could you please help me to the classroom after school?
如果你在外面逗留得太晚,你的父母亲会为你担心.
If you stay out too late, your parents will you.
你至少要花半个小时才能到达那里.
It will take you half an hour to get there.