Shanghai is bigger than ____city in Japan.

----We love our capital Beijing, one of ______cities in the world. ------So do I. 

If there are     trees, the air in our city will be      cleaner.

—We're doing a lot to protect our environment, but it is not good enough. —So we should try______ to look after it.

I’m quiet, but Laura likes talking with people. So she is _______ than me.