二、連詞成句。
1. dirty, what, our, made, city (?)
What made our city dirty?
2. dirty, rubbish, the, made, messy, streets, and (.)
Rubbish made the streets messy and dirty.
3. dead, there, rubbish, was, in, the, water, the, and, fish, were (.)
There was rubbish in the water and the fish were dead.
4. do, what, clean, we, to, keep, city, can, our (?)
What can we do to keep our city clean?
5. bin, we, put, can, rubbish, the, in (.)
We can put rubbish in the bin.