Air pollution has become__________ than ever before. We must do something to stop it.

---Mum, could you buy me a dress like this?  --Certainly, we can buy _______ one than this, but ________ this.

The cable Internet seems ______ than I expected.

Of all the streets in Beijing, Wangfujing is ___.

The boy isn’t short .He is ________than he was two years ago.