下面哪一个划线部分的元音字母u的读音与其他不同的是:
It will be hard for us to get up in the morning if we _______ to bed too late.
-- Mum, ______ is my football? -- It's under your bed.
I made this bookshelf all on ______ own.
--What’s this in English? --____________.
—Lucy, I hear the new TV tower is fantastic. Could you tell me? —Sure! Take No. 8 bus. It’s not far.