Now the air in Yancheng is _______ than it used to be . We should do something to stop it .
Sit down, please. -_______.
-----_______ do you spell "tree"? ----T-R-E---E
---Good morning, Lingling.---- .
找出下列单词中归类或读音不同于其他单词的一项。
If Tom_________ the game, he will be the__________.