将句子改成主从复合句

The bridge built last year is two kilometers long.

将句子改成主从复合句

Having finished their work, they had a rest.

将句子改成简单句

Fetch a few chairs for us, will you?

将句子改成简单句

I have told him many times but he still can't remember it.

将句子改成主从复合句

Seen from the top of the mountain, the lake looks like a mirror.