下列各组单词中,画线部分发音不同于其它三个的单词是______。
She can play the piano________than me.
The firefighters tried their best to________the forest fire.
The first question is________harder than the second one.
—The little girl________her seat to an old man on the crowded bus.—How kind she is!
If you want to study abroad,why not consider________to Australia?