As for me, I enjoy traveling around and I want to see the world. So I'd rather work as a guide in tourism perhap, but I haven't made the final choice yet.请问:so 与 but 可以连用吗?
The challenge we face is to find ways to meet the needs of our growing
population while _______(protect) the environment.这里填protecting是省略了主语和be动词吗?但是主语不是the challenge吗?